The main task in life is simply this: to identify and separate matters so that I can say clearly to myself which are externals not under my control, and which have to do with the choices I actually control.

Machinery and labor-saving devices are only valuable as they serve to reduce the cost of manufacture.

我们必须建立一个既能保护公民又不与世界隔绝的欧洲。

历史学家是向后看的先知。

The only way to save a rhinoceros is to save the environment in which it lives, because there's a mutual dependency between it and millions of other species of both animals and plants.