Life is a journey, not a destination.
Trust thyself: every heart vibrates to that iron string.
A man should learn to detect and watch that gleam of light which flashes across his mind from within, more than the lustre of the firmament of bards and sages. Yet he dismisses without notice his thought, because it is his. In every work of genius we recognize our own rejected thoughts: they come back to us with a certain alienated majesty.
If your mind is empty, it is always ready for anything, it is open to everything.
Stubborn and ardent clinging to one's opinion is the best proof of stupidity.
I cannot help fearing that men may reach a point where they look on every new theory as a danger, every innovation as a toilsome trouble, every social advance as a first step toward revolution, and that they may absolutely refuse to move at all.