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。
我们教授一门学科不是为了培养关于该学科的小型活图书馆，而是让学生自己学会数学思考。
自然的法则是无情的。
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.