Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.

Don't be too hard on me. Everyone has to sacrifice at the altar of stupidity from time to time.

I think we have to safeguard ourselves against people who are a menace to others, quite apart from what may have motivated their deeds.

The State idea is not according to my heart. I cannot understand why it is needed. It is connected with narrow-minded and economic obstacles. I believe it is bad. I have always been against it.

Only in mathematics and physics was I, through self-study, far beyond the school curriculum, and also with regard to philosophy as it was taught in the school curriculum.

But their intervention makes our acts to serve ever less merely the immediate claims of our instincts.

The only justifiable purpose of political institutions is to ensure the unhindered development of the individual.