A mathematician's work is never done; there are always new questions to ask and new mysteries to solve.
True leadership means making tough decisions that balance short-term gains with long-term vision.
当我们投资于可持续农业时,我们就是在投资地球及其居民的健康。
When I look at the world I'm pessimistic, but when I look at people I am optimistic.
I am not imposed upon by fine words; I can see what actions mean.
I don't mind being a symbol but I don't want to become a monument.