To be free is not merely to cast off one's chains, but to live in a way that respects and enhances the freedom of others.

If you think you understand quantum mechanics, you don't understand quantum mechanics.

The true discovery of America is before us. The true fulfillment of our spirit, of our people, of our mighty and immortal land, is yet to come.

Love is the most powerful force in the universe.

科学的真正力量在于它能够在我们追求知识的过程中团结我们。