This is from my Books page, on which you will find reviews of all of my favorites.
“I write in brief because your understanding is large. My words are short as the subject is long. But let me not detain you: go forward.”
This book could easily be a part two (or part one) of The Art of Worldly Wisdom. Gracián philosophizes to an even deeper level on humans: the things we do, think, and say. Then he tells us how it can be done better, why, and how.