Reject your sense of injury and the injury itself disappears.

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

If a window of opportunity appears, don't pull down the shade.

Everything rises and falls on leadership.

True friendship can afford true knowledge. It does not depend on darkness and ignorance.

It takes an endless amount of history to make even a little tradition.

Knowledge is soon changed, then lost in the mist, an echo half-heard.

Information is not knowledge.

We don't see things as they are, we see them as we are.

Research is creating new knowledge.