如果我们让过去和现在争吵，我们将失去未来。
The value or worth of a man is, as of all other things, his price; that is to say, so much as would be given for the use of his power.
一个好的数学家是懒惰的，但是以一种建设性的方式。
有些崇拜我的人常常说我的头脑几乎有一只篮子那么大，不过他们不肯说出这只篮子的尺寸。