Change is the law of life. And those who look only to the past or present are certain to miss the future.

One of the most sincere forms of respect is actually listening to what another has to say.

The heresy of one age becomes the orthodoxy of the next.

The dangerous man is the one who has only one idea.

There is no other consolation to the emptiness of the past than the memory of it.

It is not enough to have a good mind; the main thing is to use it well

“Education costs money. But then so does ignorance.”