There are two freedoms - the false, where a man is free to do what he likes; the true, where he is free to do what he ought.
The future belongs to those who can balance tradition with transformation.
The language of mathematics is the language of the universe, and by learning it, we can understand the cosmos.
The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all. And that, of course, causes great confusion.
The person who tries to live alone will not succeed as a human being. His heart withers if it does not answer another heart. His mind shrinks away if he hears only the echoes of his own thoughts and finds no other inspiration.