Uncertainty is the prerequisite to gaining knowledge and frequently the result as well.

The suffering of a soul that can suffer greatly -- that and only that, is tragedy.

There is no dignity like the dignity of a soul in agony.

It was a Roman who said it was sweet to die for one's country. The Greeks never said it was sweet to die for anything. They had no vital lies.

When the freedom they wished for most was freedom from responsibility, then Athens ceased to be free and was never free again.

Old ideas are continually being slain by new facts. There is nothing stable in the conclusions of the mind, and it is impossible that there ever should be unless we hold that the universe is made to the measure of the human mind, an assumption for which nothing in the past gives any warrant.

The fullness of life is in the hazards of life.