The essence of philosophy is that a man should so live that his happiness shall depend as little as possible on external things.

The essence of philosophy is that a man should so live that his happiness shall depend as little as possible on external things.

哲学的本质是一个人应该这样生活，他的幸福应该尽可能少地依赖于外在的东西。

-- Epictetus 埃皮克特斯