一句谎话需要无数更大的谎话来遮掩。

人体是最复杂的谜题，而医学是我们解决它的方式。

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 past is a puzzle, and every piece matters."

The only thing that can stop you is you.

If you find serenity and happiness，they may be jealous；Be happy anyway。People really need help but may attack you if you do help them。