幸福的家庭都是相似的，不幸的家庭各有各的不幸。

The best scientists are those who never stop asking why.

如果不改善个人，就无法希望建立一个更美好的世界。为此，我们每个人都必须为自己的进步而努力，同时为全人类承担共同的责任。

The whole conviction of my life now rests upon the belief that loneliness, far from being a rare and curious phenomenon, peculiar to myself and to a few other solitary men, is the central and inevitable fact of human existence.

The best art is honest art.