--- title: "Topic: abstraction" description: "Generated static Jiang Lens topic dossier for abstraction." topic_slug: "abstraction" generated: "true" --- # Topic: abstraction Generated static topic dossier for agents. Use this topic page as a routing and synthesis surface, not as primary evidence for Jiang-spoken claims. Final answers should cite the source reading, transcript segment, source ref, and video timestamp linked below. Human topic page: [/topics/abstraction/](https://jianglens.com/topics/abstraction/) Text mirror: [/topics/abstraction.txt](https://jianglens.com/topics/abstraction.txt) Markdown mirror: [/topics/abstraction.md](https://jianglens.com/topics/abstraction.md) Citation rule: do not cite this .txt/.md mirror in final answers. Do not cite the topic page as primary evidence for what Jiang said. Cite human-readable source readings for generated summaries and lens context; cite transcript and video timestamp links below for Jiang-spoken quotations. Aliases: `abstractions` ## What This Topic Covers This generated topic groups Jiang Lens evidence about **abstraction** across transcript matches, source readings, semantic tags, and source refs. Current focus: Removal from direct reality; in the city people no longer see where food, trust, or social support come from. Most connected source readings: **Capital Steals Attention And Calls It Freedom**; **Imagination Came Before Civilization**; **Collapse Is Sudden**. Nearby topic cluster: Money AS GOD, Capital, Protestant Reformation, Enlightenment, Symbols. ## Extracted Topic Notes - Removal from direct reality; in the city people no longer see where food, trust, or social support come from. Source refs: `video:predictive-history-k-l9jbgo74@transcript:v1#seg-0021`; `video:predictive-history-k-l9jbgo74@transcript:v1#seg-0022` - diagnosis: Making capital more abstract culminates in money as God: a symbol that is both nothing and everything and can consume an entire life. Source refs: `video:predictive-history-b5fthagng8c@transcript:v1#seg-0003`, `video:predictive-history-b5fthagng8c@transcript:v1#seg-0004` - model: Protestantism and then the Enlightenment increase the abstraction and extraction power of transnational capital, culminating in money replacing God. Source refs: `video:predictive-history-b5fthagng8c@transcript:v1#seg-0036` - definition: Symbols in Ice Age art express abstractions such as energy, life force, cycle, repetition, and messages from the spirit world. Source refs: `video:predictive-history-lvhsg5qtds8@transcript:v1#seg-0023`, `video:predictive-history-lvhsg5qtds8@transcript:v1#seg-0024` - definition: Abstraction means removal from reality; civilizational maturity increases abstraction, individualism, atomization, and dependence on money. Source refs: `video:predictive-history-k-l9jbgo74@transcript:v1#seg-0021`, `video:predictive-history-k-l9jbgo74@transcript:v1#seg-0022` - definition: Power is defined as alchemy: the capacity to turn nothing into everything by making abstractions such as money, the individual, and the nation-state command real life. Source refs: `video:predictive-history-lt8xlz78zvy@transcript:v1#seg-0084`, `video:predictive-history-lt8xlz78zvy@transcript:v1#seg-0085` - diagnosis: Jiang models the village-to-city transition as an abstraction shift: village life is emotionally embedded and purposeful, while city life is regulated by money and clocks. Source refs: `video:predictive-history-cylkqpsffry@transcript:v1#seg-0019`, `video:predictive-history-cylkqpsffry@transcript:v1#seg-0020` - model: The city and later the internet raise abstraction: people become curious and stimulated but lose direct knowledge of where things come from and what rules govern action. Source refs: `video:predictive-history-cylkqpsffry@transcript:v1#seg-0021`, `video:predictive-history-cylkqpsffry@transcript:v1#seg-0022` - diagnosis: Urban modernity replaces emotionally embedded village life with money, clock time, abstraction, and institutional regulation. Source refs: `video:predictive-history-ra2v9hkahz8@transcript:v1#seg-0019`, `video:predictive-history-ra2v9hkahz8@transcript:v1#seg-0021` ## Quoted Transcript Hits 1. **Capital Steals Attention And Calls It Freedom** / Secret History #25: Capital of Evil -- 2025-12-09, day precision Timestamp: [2:57](https://www.youtube.com/watch?v=B5FtHagng8c&t=177s) | Transcript: [seg-0003](https://jianglens.com/episodes/predictive-history-b5fthagng8c/transcript/#seg-0003) Source ref: `video:predictive-history-b5fthagng8c@transcript:v1#seg-0003` Quote: "...second trick is to make capital more abstract, okay? So the abstraction of capital. So let's use an example, okay? Grain was initially capital...." Human reading: [/episodes/predictive-history-b5fthagng8c/](https://jianglens.com/episodes/predictive-history-b5fthagng8c/) | Text mirror: [/episodes/predictive-history-b5fthagng8c.txt](https://jianglens.com/episodes/predictive-history-b5fthagng8c.txt) | JSON: [/data/lens/episodes/predictive-history-b5fthagng8c.json](https://jianglens.com/data/lens/episodes/predictive-history-b5fthagng8c.json) 2. **Capital Steals Attention And Calls It Freedom** / Secret History #25: Capital of Evil -- 2025-12-09, day precision Timestamp: [4:07](https://www.youtube.com/watch?v=B5FtHagng8c&t=247s) | Transcript: [seg-0004](https://jianglens.com/episodes/predictive-history-b5fthagng8c/transcript/#seg-0004) Source ref: `video:predictive-history-b5fthagng8c@transcript:v1#seg-0004` Quote: "will show you, the great innovation of the past hundred years is to convince people that money is God. Money is both nothing and..." Human reading: [/episodes/predictive-history-b5fthagng8c/](https://jianglens.com/episodes/predictive-history-b5fthagng8c/) | Text mirror: [/episodes/predictive-history-b5fthagng8c.txt](https://jianglens.com/episodes/predictive-history-b5fthagng8c.txt) | JSON: [/data/lens/episodes/predictive-history-b5fthagng8c.json](https://jianglens.com/data/lens/episodes/predictive-history-b5fthagng8c.json) Related lens: [Attention Capture As Capital Extraction](https://jianglens.com/lens/attention-capture-as-capital-extraction/#anxiety-returns-attention-to-work) 3. **Capital Steals Attention And Calls It Freedom** / Secret History #25: Capital of Evil -- 2025-12-09, day precision Timestamp: [37:20](https://www.youtube.com/watch?v=B5FtHagng8c&t=2240s) | Transcript: [seg-0036](https://jianglens.com/episodes/predictive-history-b5fthagng8c/transcript/#seg-0036) Source ref: `video:predictive-history-b5fthagng8c@transcript:v1#seg-0036` Quote: "So what I will do is explain to you what the Protestant Reformation is. The Protestant Reformation radically changes how we see ourselves and..." Human reading: [/episodes/predictive-history-b5fthagng8c/](https://jianglens.com/episodes/predictive-history-b5fthagng8c/) | Text mirror: [/episodes/predictive-history-b5fthagng8c.txt](https://jianglens.com/episodes/predictive-history-b5fthagng8c.txt) | JSON: [/data/lens/episodes/predictive-history-b5fthagng8c.json](https://jianglens.com/data/lens/episodes/predictive-history-b5fthagng8c.json) 4. **Imagination Came Before Civilization** / Secret History #11: Dawn of the Human Imagination -- 2025-10-21, day precision Timestamp: [23:35](https://www.youtube.com/watch?v=LvHsg5qtDs8&t=1415s) | Transcript: [seg-0023](https://jianglens.com/episodes/predictive-history-lvhsg5qtds8/transcript/#seg-0023) Source ref: `video:predictive-history-lvhsg5qtds8@transcript:v1#seg-0023` Quote: "...okay? Why are there symbols in art? Well, because there's some abstractions, some concepts you cannot draw, right? So for example, energy is a..." Human reading: [/episodes/predictive-history-lvhsg5qtds8/](https://jianglens.com/episodes/predictive-history-lvhsg5qtds8/) | Text mirror: [/episodes/predictive-history-lvhsg5qtds8.txt](https://jianglens.com/episodes/predictive-history-lvhsg5qtds8.txt) | JSON: [/data/lens/episodes/predictive-history-lvhsg5qtds8.json](https://jianglens.com/data/lens/episodes/predictive-history-lvhsg5qtds8.json) 5. **Imagination Came Before Civilization** / Secret History #11: Dawn of the Human Imagination -- 2025-10-21, day precision Timestamp: [24:38](https://www.youtube.com/watch?v=LvHsg5qtDs8&t=1478s) | Transcript: [seg-0024](https://jianglens.com/episodes/predictive-history-lvhsg5qtds8/transcript/#seg-0024) Source ref: `video:predictive-history-lvhsg5qtds8@transcript:v1#seg-0024` Quote: "If you want to tell the story, okay? Second is you are trying to visualize the language of a spirit world, okay? So the..." Human reading: [/episodes/predictive-history-lvhsg5qtds8/](https://jianglens.com/episodes/predictive-history-lvhsg5qtds8/) | Text mirror: [/episodes/predictive-history-lvhsg5qtds8.txt](https://jianglens.com/episodes/predictive-history-lvhsg5qtds8.txt) | JSON: [/data/lens/episodes/predictive-history-lvhsg5qtds8.json](https://jianglens.com/data/lens/episodes/predictive-history-lvhsg5qtds8.json) 6. **Collapse Is Sudden** / Secret History #2: How Societies Collapse -- 2025-08-22, day precision Timestamp: [24:38](https://www.youtube.com/watch?v=K-_l9jBGo74&t=1478s) | Transcript: [seg-0021](https://jianglens.com/episodes/predictive-history-k-l9jbgo74/transcript/#seg-0021) Source ref: `video:predictive-history-k-l9jbgo74@transcript:v1#seg-0021` Quote: "...you mature as a civilization, what happens is you have increased abstraction. Abstraction is just a fancy word for you're removed from reality. Okay?..." Human reading: [/episodes/predictive-history-k-l9jbgo74/](https://jianglens.com/episodes/predictive-history-k-l9jbgo74/) | Text mirror: [/episodes/predictive-history-k-l9jbgo74.txt](https://jianglens.com/episodes/predictive-history-k-l9jbgo74.txt) | JSON: [/data/lens/episodes/predictive-history-k-l9jbgo74.json](https://jianglens.com/data/lens/episodes/predictive-history-k-l9jbgo74.json) 7. **Collapse Is Sudden** / Secret History #2: How Societies Collapse -- 2025-08-22, day precision Timestamp: [25:58](https://www.youtube.com/watch?v=K-_l9jBGo74&t=1558s) | Transcript: [seg-0022](https://jianglens.com/episodes/predictive-history-k-l9jbgo74/transcript/#seg-0022) Source ref: `video:predictive-history-k-l9jbgo74@transcript:v1#seg-0022` Quote: "...that holds people together? It's money. Right? Money is the greatest abstraction. The problem with money is that, it means we don't have to..." Human reading: [/episodes/predictive-history-k-l9jbgo74/](https://jianglens.com/episodes/predictive-history-k-l9jbgo74/) | Text mirror: [/episodes/predictive-history-k-l9jbgo74.txt](https://jianglens.com/episodes/predictive-history-k-l9jbgo74.txt) | JSON: [/data/lens/episodes/predictive-history-k-l9jbgo74.json](https://jianglens.com/data/lens/episodes/predictive-history-k-l9jbgo74.json) 8. **Power Is Alchemy** / Secret History #1: How Power Works (4K Re-Upload with Audio Fixed) -- 2025-08-22, day precision Timestamp: [1:07:43](https://www.youtube.com/watch?v=lt8XLz78ZvY&t=4063s) | Transcript: [seg-0084](https://jianglens.com/episodes/predictive-history-lt8xlz78zvy/transcript/#seg-0084) Source ref: `video:predictive-history-lt8xlz78zvy@transcript:v1#seg-0084` Quote: "All right. Any questions? Excuse me? Okay, yeah, so there are three great monotheistic religions, right? Judaism, Christianity, and Islam. What I will show..." Human reading: [/episodes/predictive-history-lt8xlz78zvy/](https://jianglens.com/episodes/predictive-history-lt8xlz78zvy/) | Text mirror: [/episodes/predictive-history-lt8xlz78zvy.txt](https://jianglens.com/episodes/predictive-history-lt8xlz78zvy.txt) | JSON: [/data/lens/episodes/predictive-history-lt8xlz78zvy.json](https://jianglens.com/data/lens/episodes/predictive-history-lt8xlz78zvy.json) 9. **Power Is Alchemy** / Secret History #1: How Power Works (4K Re-Upload with Audio Fixed) -- 2025-08-22, day precision Timestamp: [1:09:09](https://www.youtube.com/watch?v=lt8XLz78ZvY&t=4149s) | Transcript: [seg-0085](https://jianglens.com/episodes/predictive-history-lt8xlz78zvy/transcript/#seg-0085) Source ref: `video:predictive-history-lt8xlz78zvy@transcript:v1#seg-0085` Quote: "And maybe in science class, you're taught that alchemy is this fake science. It's a pseudo -science, and it did not work. What you..." Human reading: [/episodes/predictive-history-lt8xlz78zvy/](https://jianglens.com/episodes/predictive-history-lt8xlz78zvy/) | Text mirror: [/episodes/predictive-history-lt8xlz78zvy.txt](https://jianglens.com/episodes/predictive-history-lt8xlz78zvy.txt) | JSON: [/data/lens/episodes/predictive-history-lt8xlz78zvy.json](https://jianglens.com/data/lens/episodes/predictive-history-lt8xlz78zvy.json) 10. **Kill The Cult Of The Self** / Civilization #57： How Modernism Ruined Everything (Re-upload AUDIO FIXED -- Thanks to Gabriel Bessa) -- 2025-06-04, day precision Timestamp: [23:38](https://www.youtube.com/watch?v=cylkQPsfFRY&t=1418s) | Transcript: [seg-0019](https://jianglens.com/episodes/predictive-history-cylkqpsffry/transcript/#seg-0019) Source ref: `video:predictive-history-cylkqpsffry@transcript:v1#seg-0019` Quote: "And Freud, okay? So to summarize the main ideas, Freud believes that our sexual urges is what underpins our identity as well as civilization...." Human reading: [/episodes/predictive-history-cylkqpsffry/](https://jianglens.com/episodes/predictive-history-cylkqpsffry/) | Text mirror: [/episodes/predictive-history-cylkqpsffry.txt](https://jianglens.com/episodes/predictive-history-cylkqpsffry.txt) | JSON: [/data/lens/episodes/predictive-history-cylkqpsffry.json](https://jianglens.com/data/lens/episodes/predictive-history-cylkqpsffry.json) 11. **Kill The Cult Of The Self** / Civilization #57： How Modernism Ruined Everything (Re-upload AUDIO FIXED -- Thanks to Gabriel Bessa) -- 2025-06-04, day precision Timestamp: [24:55](https://www.youtube.com/watch?v=cylkQPsfFRY&t=1495s) | Transcript: [seg-0020](https://jianglens.com/episodes/predictive-history-cylkqpsffry/transcript/#seg-0020) Source ref: `video:predictive-history-cylkqpsffry@transcript:v1#seg-0020` Quote: "But when we moved to the cities, it is money and the clock that regulates our life. And it's still true today, right? So..." Human reading: [/episodes/predictive-history-cylkqpsffry/](https://jianglens.com/episodes/predictive-history-cylkqpsffry/) | Text mirror: [/episodes/predictive-history-cylkqpsffry.txt](https://jianglens.com/episodes/predictive-history-cylkqpsffry.txt) | JSON: [/data/lens/episodes/predictive-history-cylkqpsffry.json](https://jianglens.com/data/lens/episodes/predictive-history-cylkqpsffry.json) 12. **Kill The Cult Of The Self** / Civilization #57： How Modernism Ruined Everything (Re-upload AUDIO FIXED -- Thanks to Gabriel Bessa) -- 2025-06-04, day precision Timestamp: [26:05](https://www.youtube.com/watch?v=cylkQPsfFRY&t=1565s) | Transcript: [seg-0021](https://jianglens.com/episodes/predictive-history-cylkqpsffry/transcript/#seg-0021) Source ref: `video:predictive-history-cylkqpsffry@transcript:v1#seg-0021` Quote: "Instead of reacting emotionally, the metropolitan type reacts primarily in a rational manner, thus creating a mental predominance through the intensification of consciousness, which..." Human reading: [/episodes/predictive-history-cylkqpsffry/](https://jianglens.com/episodes/predictive-history-cylkqpsffry/) | Text mirror: [/episodes/predictive-history-cylkqpsffry.txt](https://jianglens.com/episodes/predictive-history-cylkqpsffry.txt) | JSON: [/data/lens/episodes/predictive-history-cylkqpsffry.json](https://jianglens.com/data/lens/episodes/predictive-history-cylkqpsffry.json) ## Source Readings - [Capital Steals Attention And Calls It Freedom](https://jianglens.com/episodes/predictive-history-b5fthagng8c/) (claims) -- 2025-12-09, day precision Source: [Secret History #25: Capital of Evil](https://www.youtube.com/watch?v=B5FtHagng8c) Transcript page: [/episodes/predictive-history-b5fthagng8c/transcript/](https://jianglens.com/episodes/predictive-history-b5fthagng8c/transcript/) | Transcript text: [/episodes/predictive-history-b5fthagng8c/transcript.txt](https://jianglens.com/episodes/predictive-history-b5fthagng8c/transcript.txt) | JSON: [/data/lens/episodes/predictive-history-b5fthagng8c.json](https://jianglens.com/data/lens/episodes/predictive-history-b5fthagng8c.json) Summary: Capital is not a thing you own. - [Imagination Came Before Civilization](https://jianglens.com/episodes/predictive-history-lvhsg5qtds8/) (claims) -- 2025-10-21, day precision Source: [Secret History #11: Dawn of the Human Imagination](https://www.youtube.com/watch?v=LvHsg5qtDs8) Transcript page: [/episodes/predictive-history-lvhsg5qtds8/transcript/](https://jianglens.com/episodes/predictive-history-lvhsg5qtds8/transcript/) | Transcript text: [/episodes/predictive-history-lvhsg5qtds8/transcript.txt](https://jianglens.com/episodes/predictive-history-lvhsg5qtds8/transcript.txt) | JSON: [/data/lens/episodes/predictive-history-lvhsg5qtds8.json](https://jianglens.com/data/lens/episodes/predictive-history-lvhsg5qtds8.json) Summary: A source-grounded reading of Jiang's dawn-of-humanity lecture: Darwinism becomes a rival theology, cave art becomes a portal, speech begins as song, and modern society is accused of socializing people out of empathy. - [Collapse Is Sudden](https://jianglens.com/episodes/predictive-history-k-l9jbgo74/) (glossary, claims) -- 2025-08-22, day precision Source: [Secret History #2: How Societies Collapse](https://www.youtube.com/watch?v=K-_l9jBGo74) Transcript page: [/episodes/predictive-history-k-l9jbgo74/transcript/](https://jianglens.com/episodes/predictive-history-k-l9jbgo74/transcript/) | Transcript text: [/episodes/predictive-history-k-l9jbgo74/transcript.txt](https://jianglens.com/episodes/predictive-history-k-l9jbgo74/transcript.txt) | JSON: [/data/lens/episodes/predictive-history-k-l9jbgo74.json](https://jianglens.com/data/lens/episodes/predictive-history-k-l9jbgo74.json) Summary: Societies do not fall because one problem gets worse in a straight line. - [Power Is Alchemy](https://jianglens.com/episodes/predictive-history-lt8xlz78zvy/) (claims) -- 2025-08-22, day precision Source: [Secret History #1: How Power Works (4K Re-Upload with Audio Fixed)](https://www.youtube.com/watch?v=lt8XLz78ZvY) Transcript page: [/episodes/predictive-history-lt8xlz78zvy/transcript/](https://jianglens.com/episodes/predictive-history-lt8xlz78zvy/transcript/) | Transcript text: [/episodes/predictive-history-lt8xlz78zvy/transcript.txt](https://jianglens.com/episodes/predictive-history-lt8xlz78zvy/transcript.txt) | JSON: [/data/lens/episodes/predictive-history-lt8xlz78zvy.json](https://jianglens.com/data/lens/episodes/predictive-history-lt8xlz78zvy.json) Summary: The first Secret History class begins with Kant and ends with alchemy. - [Kill The Cult Of The Self](https://jianglens.com/episodes/predictive-history-cylkqpsffry/) (claims) -- 2025-06-04, day precision Source: [Civilization #57： How Modernism Ruined Everything (Re-upload AUDIO FIXED -- Thanks to Gabriel Bessa)](https://www.youtube.com/watch?v=cylkQPsfFRY) Transcript page: [/episodes/predictive-history-cylkqpsffry/transcript/](https://jianglens.com/episodes/predictive-history-cylkqpsffry/transcript/) | Transcript text: [/episodes/predictive-history-cylkqpsffry/transcript.txt](https://jianglens.com/episodes/predictive-history-cylkqpsffry/transcript.txt) | JSON: [/data/lens/episodes/predictive-history-cylkqpsffry.json](https://jianglens.com/data/lens/episodes/predictive-history-cylkqpsffry.json) Summary: Modernism begins as a religious problem before it becomes psychology, literature, art, social media, and depression. - [Kill The Cult Of The Self](https://jianglens.com/episodes/predictive-history-ra2v9hkahz8/) (claims) -- 2025-06-04, day precision Source: [Civilization #57: How Modernism Ruined Everything](https://www.youtube.com/watch?v=ra2v9HkaHz8) Transcript page: [/episodes/predictive-history-ra2v9hkahz8/transcript/](https://jianglens.com/episodes/predictive-history-ra2v9hkahz8/transcript/) | Transcript text: [/episodes/predictive-history-ra2v9hkahz8/transcript.txt](https://jianglens.com/episodes/predictive-history-ra2v9hkahz8/transcript.txt) | JSON: [/data/lens/episodes/predictive-history-ra2v9hkahz8.json](https://jianglens.com/data/lens/episodes/predictive-history-ra2v9hkahz8.json) Summary: Freud is not introduced as a neutral founder of psychology. - [Cyrus Makes Mercy Into Empire](https://jianglens.com/episodes/predictive-history-hvvtntpzq7e/) (claims) -- 2024-12-12, day precision Source: [Civilization #23: Cyrus the Great as Messiah](https://www.youtube.com/watch?v=HvVTNTPzq7E) Transcript page: [/episodes/predictive-history-hvvtntpzq7e/transcript/](https://jianglens.com/episodes/predictive-history-hvvtntpzq7e/transcript/) | Transcript text: [/episodes/predictive-history-hvvtntpzq7e/transcript.txt](https://jianglens.com/episodes/predictive-history-hvvtntpzq7e/transcript.txt) | JSON: [/data/lens/episodes/predictive-history-hvvtntpzq7e.json](https://jianglens.com/data/lens/episodes/predictive-history-hvvtntpzq7e.json) Summary: A source-grounded reading of Cyrus as the foreign messiah: exile hardens Israelite memory, Persian mercy becomes a strategy of rule, Zoroastrianism turns administration into cosmic truth, and Ezra's purity project prepares the religious machinery... - [Humans Are Religious Before They Are Economic](https://jianglens.com/episodes/predictive-history-x1e5rrmcit4/) (claims) -- 2024-09-03, day precision Source: [Civilization #2: Religion and the Dawn of Society](https://www.youtube.com/watch?v=x1E5rRmCiT4) Transcript page: [/episodes/predictive-history-x1e5rrmcit4/transcript/](https://jianglens.com/episodes/predictive-history-x1e5rrmcit4/transcript/) | Transcript text: [/episodes/predictive-history-x1e5rrmcit4/transcript.txt](https://jianglens.com/episodes/predictive-history-x1e5rrmcit4/transcript.txt) | JSON: [/data/lens/episodes/predictive-history-x1e5rrmcit4.json](https://jianglens.com/data/lens/episodes/predictive-history-x1e5rrmcit4.json) Summary: Cave paintings are not just art on stone. ## Related Topics - [Money AS GOD](https://jianglens.com/topics/money-as-god/) - [Capital](https://jianglens.com/topics/capital/) - [Protestant Reformation](https://jianglens.com/topics/protestant-reformation/) - [Enlightenment](https://jianglens.com/topics/enlightenment/) - [Symbols](https://jianglens.com/topics/symbols/) - [Spirit Language](https://jianglens.com/topics/spirit-language/) - [Individualism](https://jianglens.com/topics/individualism/) - [Money](https://jianglens.com/topics/money/) - [Atomization](https://jianglens.com/topics/atomization/) - [Power](https://jianglens.com/topics/power/) - [Alchemy](https://jianglens.com/topics/alchemy/) - [Imagination](https://jianglens.com/topics/imagination/) ## Retrieval Notes This file is generated from Jiang Lens episode JSON, semantic tags, glossary terms, source refs, and transcript segment matches. It is not a manually authored canon page. For broader or missing-topic search, use the letter shards under /topics/index/ before falling back to the bulk transcript-search files.