Always make a definition or sketch of what presents itself to your mind, so you can see it stripped bare to its essential nature and identify it clearly, in whole and in all its parts, and can tell yourself its proper name and the name of those elements of which it is compounded and into which it will be dissolved.

Marcus Aurelius. I’m taking the words out of context here so it appears that he likes sketching. I’ve been reading Martin Hammond’s Penguin translation and bookmarking every 3 paragraphs or so.