The process of writing about something is one of the best ways to learn about it.
Rather than learning something and then writing up what you’ve learned, a more productive strategy is to use the process of writing about it as a method for learning (that’s what I’m doing with these Notes).
Often we feel we understand something but, when we come to write (or talk) about it, we realise we don’t have a clear enough understanding to write about it coherently. Our thoughts are fragmented and unstructured.
Writing about it reveals those flaws and gaps in our thinking – flaws that can only be resolved by developing a deeper and clearer understanding, either through further thought or research, or both.
The Feynman technique is an example of this strategy.