"The truth is rarely pure and never simple."

All the choir of heaven and furniture of earth - in a word， all those bodies which compose the frame of the world - have not any subsistence without a mind.

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.

自由不仅仅是随心所欲的机会；也不仅仅是在既定选项之间选择的机会。自由首先是制定可用选择的机会，对它们进行辩论——然后，才是选择的机会。

Keep your face always toward the sunshine, and shadows will fall behind you.

In every word, there is a piece of the writer's soul.