过去是一个异国；他们在那里做事的方式不同。

We must balance short-term demands with long-term sustainability to create lasting value.

Self-education is, I firmly believe, the only kind of education there is.

If the highest aim of a captain were to preserve his ship， he would keep it in port forever.

The only freedom which deserves the name is that of pursuing our own good in our own way， so long as we do not attempt to deprive others of theirs， or impede their efforts to obtain it.

人类行为是自然的一部分，可以通过自然科学的方法来研究。