The highest of all is not to understand the highest but to act upon it.

Thus our own age is essentially one of understanding, and on the average, perhaps, more knowledgeable than any former generation, but it is without passion. Every one knows a great deal, we all know which way we ought to go and all the different ways we can go, but nobody is willing to move.

Genius, like a thunderstorm, comes up against the wind.

The crucial thing is to find a truth which is truth for me, to find the idea for which I am willing to live and die.

I begin with the principle that all men are bores. Surely no one will prove himself so great a bore as to contradict me in this.

It belongs to the imperfection of everything human that man can only attain his desire by passing through its opposite.

If you think you understand, it isn't God.