Prof used to say that if you cannot write it out so that it makes sense you really do not understand it. In my experience he was right. I have found significant holes in my thinking as I have tried to draft a response to a question.
That requires integrity. To admit that there is a hole, acknowledge it, and then go to work to try to fill it. It is tough work. It demands humility, curiosity, openness, and work. It is cleansing.
Most of the time I like it.