Freedom of opinion can only exist when the government thinks itself secure.

Freedom comes only to those who no longer ask of life that it shall yield them any of those personal goods that are subject to the mutations of time.

I would never die for my beliefs because I might be wrong.

The world is full of magical things patiently waiting for our wits to grow sharper.

I like mathematics because it is not human and has nothing particular to do with this planet or with the whole accidental universe - because, like Spinoza's God, it won't love us in return.