弟子不必不如师，师不必贤于弟子。弟子超过老师，是很正常的事情，这也是正是老师所希望的。

The only religious way to think of death is as part and parcel of life.

我已将这一原则——每一微小变异若有益便被保存——称为自然选择。

I am not an Athenian or a Greek，but a citizen of the world.

是大地的泪点，使她的微笑保持着青春不谢。

The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.