变革时期的领导力既需要远见，也需要做出艰难决定的勇气。

Change the way you look at things and the things you look at change.

The true challenge in mathematics is not solving problems, but asking the right questions.

Truth is stranger than fiction, but it is because Fiction is obliged to stick to possibilities; Truth isn’t.

To write poetry after Auschwitz is barbaric.

可持续性不是一种选择，而是一种责任。