Virtue is more to be feared than vice， because its excesses are not subject to the regulation of conscience.

The history of life is a history of change.

"The poet is the one who breaks the silence, who speaks first, who dares to speak."

"Reality is a cliché from which we escape by metaphor."

精神的火焰在孤独中燃烧得最明亮。

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.