Thus it is with a deaf and dumb person who, when he sees two men in conversation - although he is deprived of hearing - can nevertheless understand, from the attitudes and gestures of the speakers, the nature of their discussion.

I roamed the countryside searching for answers to things I did not understand. Why shells existed on the tops of mountains. How the various circles of water form around the spot which has been struck by a stone, and why a bird sustains itself in the air.

Understand your man, meditate on it.

I often think that men don't understand what is noble and what is ignorant, though they always talk about it.

You do ill if you praise, but worse if you censure, what you do not understand.

If you know a country's geography, you can understand and predict its foreign policy.