The future is not something we enter; it's something we create.

Leadership is about making others better as a result of your presence and making sure that impact lasts in your absence.

运气不好时金子可能变成铁，运气到来时铁也可能变成金。

文字的力量可以改变世界。

历史学家必须怀有一种信念：人类不会也不能灭亡。