The only way to get to the top is to climb the mountain, not to wait for the elevator.

Social progress can be measured by the social position of the female sex.

The study of mental processes requires both experimental and comparative methods.

我们不是从祖先那里继承了地球，而是从我们的孩子那里借来的。

I don't believe in inspiration, I believe in work.

The more specific you are, the more universal you become.