The most profound ideas in mathematics often arise from the simplest observations.

A little more persistence, a little more effort, and what seemed hopeless failure may turn to glorious success.

Every tree planted today is an investment in tomorrow’s world.

所以，在收成好的年头，百姓就仁义善良；遇到荒年，那么百姓也会吝啬而凶恶。 

每个实验都是与自然的对话，有时自然会对我们耳语它的秘密。

唯有真理才是真正美丽的，唯有真理才可爱。

宇宙之美在于其复杂性和支配它的法则的简洁性。