There is a paradox in knowledge: the more you share it, the more you have. Not because ideas multiply magically, but because the act of explaining what you know to another person forces you to understand it better than you did before.
The paradox of shared knowledge
The usual economic intuition works like this: if I have something and I share it, I have less. With money, this is true. With knowledge, it is exactly the reverse.
When you share an idea, you do not lose it. You reinforce it. You articulate it in a way that lets you review it. You receive questions that reveal gaps in your understanding. You find people who extend it in directions you had not considered.
Shared knowledge does not divide: it multiplies.
Why teaching deepens learning
When you learn something for yourself, you can afford a certain vagueness. You roughly know what it is about. You can move forward even if you have not understood a detail. Your understanding can be functional without being rigorous.
When you have to teach something, you cannot afford that vagueness. Students ask questions. They ask exactly what you glossed over. They point out the contradictions you ignored. They ask for concrete examples of what you explained in the abstract.
This pressure produces a type of understanding much more solid than what you get studying alone. The Feynman technique — explaining something as if you were teaching it to a child — is not just a study method. It is a deep principle about how understanding works.
Ways to share
There is no single way to share what you know. Some possibilities:
Writing in public. A blog, a newsletter, social media posts. Writing for a real reader — not for yourself — requires a level of clarity that private writing does not.
Explaining to someone you trust. A colleague, a friend, a family member. Find someone who does not know what you know about a topic and explain what you have learnt. Their questions will be more revealing than any self-assessment.
Speaking in public. A presentation, an informal talk, a podcast. The oral format imposes its own demands: you have to know when to stop, how to make the complex accessible, how to respond in real time.
Documenting internally. In a team or company, documenting what you know about a process, a domain or a lesson learnt. The audience is not “the world”, but the demand for clarity is the same.
The fear of sharing
The greatest obstacle to sharing what you know is not a lack of anything interesting to say. It is the fear of seeming ignorant, of being pointed out for a mistake, of sharing something everyone else already knew.
This fear has an enormous cost. People with genuinely valuable ideas do not share them out of fear of the reaction, and those ideas are lost or remain locked in a note system that no one else sees.
The cure is not to eliminate the fear, but to recalibrate it. The standard for sharing does not have to be “I know everything about this topic”. It can be: “I know something I learnt last week that I found useful.” That level of knowledge — genuine but not exhaustive — is exactly what has the most value for those who are one step behind you on the journey.
Learning in public: a sustainable practice
The concept of “learning in public” popularised by Shawn Wang proposes a simple way of integrating sharing into the learning process itself: instead of waiting to be an expert to share, sharing the process of learning.
Not “here is everything I know about X”. But “here is what I learnt this week about X, what I still do not understand, and the questions I am asking myself”.
This practice has three effects:
- It consolidates learning (you have to articulate it).
- It attracts valuable feedback (people who know more correct and extend your understanding).
- It builds a public record of your progress (which can be valuable for you and for others).
In the next chapter we close the application block with a topic that has changed the possibilities of these systems: artificial intelligence and how it can amplify (without replacing) your knowledge management.
