苦难！我们所有美好的品质、生命中的价值都归功于它；我们因它而怜悯，因它而勇敢，因它而拥有所有美德。

The only way to do great work is to love what you do.

The greatest theorems often start as simple conjectures, born out of intuition.

人生中80%最重要的时刻发生在35岁之前。