Mathematics is the poetry of logical ideas.

The older one grows, the more one likes indecency.

在共和政府中，人人平等；在专制政府中，人人也平等：在前者中，因为他们是一切；在后者中，因为他们什么都不是。

认为世界上只有一种真理，而自己恰好掌握了它，在我看来这是世界上一切邪恶的最深根源。

I cannot but be astonished that Socrates， after having so often repeated to his fellow citizens that he did not pretend to any wisdom， but had been appointed by the gods to a mission of benevolence towards them， should have been condemned to death.