解释：人有知识，犹如树木有枝叶，树木有了枝叶，能带给人阴凉，人有了知识，就可以为人民做更多的事。

We choose to go to the moon in this decade and do the other things, not because they are easy, but because they are hard, because that goal will serve to organize and measure the best of our energies and skills, because that challenge is one that we are willing to accept, one we are unwilling to postpone, and one which we intend to win, and the others, too.

The best leaders are those most interested in surrounding themselves with assistants and associates smarter than they are.

我们如何构建问题会极大地影响我们提出的解决方案。

The greatest enemy of art is the absence of limitations.

数学是理性的音乐。