——回答清华学生“国民党施行的，是否俄国的主义？”，1924年2月9日

It has always been easy to hate and destroy. To build and to cherish is much more difficult.

The past does not have to define the future.

"The ordinary is just the extraordinary that’s become familiar."

我们首先是为人类体验而设计。

唯一真正的监狱是恐惧，唯一真正的自由是从恐惧中解脱。

I don't need a title to be a legend.

合作是解决我们今天面临的复杂能源挑战的关键。