Without justice, courage is weak.

Every leaf of vegetable is a gift from nature. We must plant and harvest with reverence.

The best weapon of a dictatorship is secrecy, but the best weapon of a democracy should be the weapon of openness.

Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.

我从不相信失败。如果能享受过程，就没什么失败可言。