生命短暂，珍惜每一刻。

"I never doubted myself."

A man is a success if he gets up in the morning and gets to bed at night, and in between he does what he wants to do.

自然状态有一种自然法规来管理它，这使每个人都有义务，而这种法则就是理性，它教导所有愿意咨询它的人...没有人应该侵犯他人的生命、健康、自由或财产。

You must take personal responsibility. You cannot change the circumstances, the seasons, or the wind, but you can change yourself.

The Backstreet Boys have always been about the music and the fans.

我不认为每个人都应该成为数学家，但我确实相信许多学生没有给数学一个真正的机会。