The noblest pleasure is the joy of understanding.

There are four powers: memory and intellect, desire and covetousness. The two first are mental and the others sensual. The three senses sight, hearing, and smell cannot well be prevented; touch and taste not at all.

Anyone who conducts an argument by appealing to authority is not using his intelligence; he is just using his memory.

Whoever in discussion adduces authority uses not intellect but rather memory.

Just as food eaten without appetite is a tedious nourishment, so does study without zeal damage the memory by not assimilating what it absorbs.

This is like one thing that I've tried to do, and I think successfully, that when you realize that nothing really belongs to you, you begin to appreciate having an understanding of just where your head is at, and you feel so much better.