The Modern Art of War Ch.11: Nine Fields of Perception - Your Complete Guide to How Thoughts Appear
This is the longest chapter in the book. And honestly, it might be the most practical one.
Chapter 11 of The Modern Art of War gives you a detailed breakdown of the nine different ways thoughts show up in your awareness. Not vague philosophy. Specific, concrete descriptions of what your mind does, so you can recognize it happening in real time.