It's not supposed to be easy.Anyone who finds it easy is stupid.

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 stories are those that linger in the mind long after the last page is turned.

伟大的品牌是一次一个满意顾客建立起来的。

生物为生存而进行的普遍斗争，不是为了原材料，也不是为了能量——能量以热的形式大量存在于每个物体中（可惜无法转化）；而是为了熵，它通过能量从炽热的太阳转移到寒冷的地球而变得可用。