A dreamer is one who can only find his way by moonlight, and his punishment is that he sees the dawn before the rest of the world.

内省是唯一可以直接观察心灵的方法。

Success is not a destination, but a process of continuous improvement.

译文：绝交时不以恶语伤人。

数学中最深刻的思想往往源于最简单的观察。