哲学不是一种学说，而是一种活动。

释义：天地顺自然而动，所以日月运行不会有差错，四季的更替也不会有差错。圣人顺自然之理而动，则刑罚清明而百姓顺服。

You have to be willing to be alone to be a writer.

The world is a dangerous place, not because of those who do evil, but because of those who look on and do nothing.

化学是连接物理学和生物学的核心科学。