Mathematics is not a spectator sport; you have to play to understand.

The world is indeed full of peril, and in it there are many dark places; but still there is much that is fair, and though in all lands love is now mingled with grief, it grows perhaps the greater.

The most damaging phrase in the language is: 'It's always been done that way.'

The artist must create a spark before he can make a fire.

To love is to risk being destroyed. To not love is to destroy yourself.