You must not think that what is hard for you to master is humanly impossible； and if it is humanly possible， consider it to be within your reach.

Is there such a thing as a cheerful pessimist? That's what I am.

着眼长期，思考世界上正在发生的结构性变化。

沉默是一种美德，但在喜欢的人面前沉默，就是一种懦弱。

我要么旁观，要么参与。

农民是我们全球食品系统中无名的英雄。