There is no point treating a depressed person as though she were just feeling sad, saying, 'There now, hang on, you'll get over it.' Sadness is more or less like a head cold- with patience, it passes. Depression is like cancer.

We must be free not because we claim freedom, but because we practice it.

A leader's job is not to do the work for others, but to help others figure out how to do it themselves.

我不是一个回头看的人。我总是向前看。

质量不是希望；它是一种结果。

The attosecond timescale is to electron motion what the high-speed camera was to studying animal locomotion.

自由不仅仅是摆脱枷锁，而是以一种尊重和增进他人自由的方式生活。