灵魂是心理生活的统一体。
Civilization is not inherited; it has to be learned and earned by each generation anew.
The act of writing is an act of courage.
"Sometimes the hardest thing in life is to know which bridge to cross and which to burn."
预测未来的最好方式就是创造未来。
数学不是观赏性运动——你必须参与其中才能欣赏它的美。