The mathematician's patterns, like the painter's or the poet's, must be beautiful; the ideas, like the colors or the words, must fit together in a harmonious way.

The true value of a mathematical theory lies in its ability to connect seemingly unrelated ideas.

The freedom of thought is the most precious freedom.

The past is never dead. It's not even past.

物理学的魅力在于它能够用简单的原理解释复杂的事物。