To die for an idea is to set a rather high price upon conjecture.

Existence would be intolerable if we were never to dream.

A person is never happy except at the price of some ignorance. [The ability to focus on positives and distract your mind from negatives for at least a time is a necessary skill for being happy.]

One thing above all gives charm to men's thoughts, and this is unrest. A mind that is not uneasy irritates and bores me.

Truth possesses within herself a penetrating force, unknown alike to error and falsehood. I say 'truth' and you understand my meaning. For the beautiful words truth and justice need not to be defined in order to be understood in their true sense.

That child whose mother has never smiled upon him is worthy neither of the table of the gods nor the couch of the goddesses.

Universal peace will be realized, not because man will become better, but because a new order of things, a new science, new economic necessities, will impose peace.