It is only ideas gained from walking that have any worth.

I don't know what's the matter with people: they don't learn by understanding, they learn by some other way — by rote or something. Their knowledge is so fragile!

All the wisdom of the world is not to be found in one little academic department.

I've learned that people will forget what you said, people will forget what you did, but people will never forget how you made them feel.

No one can defeat a powerful mind.

Give me six hours to chop down a tree and I will spend the first four hours sharpening the axe.

Life is never made unbearable by circumstances, but only by lack of meaning and purpose.

The unexamined life is not worth living.