> What I cannot teach, I do not understand > What we understand well, we express clearly, and words to describe it flow easily. And the other side of the coin

> What I cannot teach, I do not understand > What we understand well, we express clearly, and words to describe it flow easily. And the other side of the coin to both is a powerful trick to really nail a topic you feel like you have gaps on: get the basics and teach it / explain it to someone; you then have to explain it clearly thus have to fill all the gaps.