John Locke, the giant of Enlightenment philosophy who laid the philosophical foundation of parliamentary democracy and became the basic idea of the American Declaration of Independence. How did he, who argued that the human mind is like a blank sheet of paper with no records at birth, tabula rasa, fill his blank canvas with great knowledge? 📰
Locke kept a notebook called ‘Commonplace Book’ throughout his life to efficiently accumulate vast information and reading notes. He rejected the common method of filling a notebook in chronological order. Instead, he designed and drew a special alphabetical vowel index table in the front of the notebook. Whenever he recorded a new concept, medical prescription, or philosophical thought, he assigned an address to this index. Thanks to this organic record system, Locke could accurately find even minor articles written 10 years ago in just 1 minute and combine them with his thoughts.
Today, BuildSelf analyzes the cognitive connection principles of the ‘indexing record’ habit that John Locke obsessively stuck to for managing knowledge, and discovers how to apply it to the modern digital information flow.
Historical & Academic Evidence
This content is based on John Locke's Treatise 'A New Method of Making Common-Place-Books' & Cognitive Research.
1. Strengthening Associative Memory via Systematic Indexing
The brain’s memory structure is not an independent box but an ‘associative memory’ network in which related information is intertwined like a net. John Locke’s index recording method is like artificially arranging organic associative links from the encoding stage when the brain accepts information as memory.
The process of fixing (tagging) information into pre-committed categories instead of randomly scattering it narrows the ‘semantic distance’ between information. Knowledge organized this way is not isolated in the brain but remains in an active standby state where it can connect at any time, dramatically reducing the search load on the frontal lobe cortex and helping recall it in 1 second when needed.
2. 3-Step Practical Routine for Modern Professionals
Establishing a Core Category Classification System
Define 4-5 core interests that you daily handle or study (e.g., philosophy, medicine, writing, technology, etc.) in Notion or a physical notebook. Do not have too many categories.
Allocating Record Addresses and Organic Recording
Whenever writing new information, always map and record the defined category tag (e.g., [#technology - AI]) next to the title. The action of writing the classification address turns on the brain's classification model.
Index Synchronization and Monthly Connection Review
Once a month, lightly review the indexed knowledge notes. Compare notes from different categories to discover commonalities or organically combine them into new intellectual ideas.
3. The Error of Unplanned Storage
Simply copying down contents or saving them to bookmarks gives the brain a false sense of security that information is preserved, accelerating forgetting. Just as Locke assigned addresses in his index, conscious intervention to classify and index categories is necessary for the brain's associative structure to work.
📌 Frequently Asked Questions (FAQ)
What is John Locke's commonplace book indexing method? ▼
It was a unique addressing system that drew a grid with the combination of alphabets (A-Z) and vowels (a, e, i, o, u) on the front page of the notebook, and wrote page numbers corresponding to specific keywords (e.g., 'Epistola' in the 'i' slot of E) in the grid slots to make cross-searching easy.
Are analog notebooks more beneficial for knowledge digestion than digital methods? ▼
Handwriting strongly stimulates the brain's cognitive control network and is advantageous for short-term encoding. However, digital methods are fast in search and link and have no data loss risk, so choosing a tool fit for your style or combining both is best.
