Freedom is an elusive concept. Some men hold themselves prisoner even when they have the power to do as they please and go where they choose, while others are free in their hearts, even as shackles restrain them.

The more tightly packed the group, the greater the need for strict social ranks and orders.

There is no man so blind as one who has made up his mind.

Life is filled with tests, one after another, and if you don't recognize them, you are certain to fail the most important ones.

Fear invites aggression - do not show it to a predator.

It's so much more interesting to study a ... damaged world. I find it difficult to learn anything in a place that's too civilized.

The man who sees an opportunity and does nothing is asleep with his eyes open.