The modern world has made us free, but it has also made us miserable.

Sun don't shine forever, but as long as it's here then we might as well shine together.

未来属于那些能够适应和变革的人。

有权势的天子，也未必尊贵；穷苦的平民，也未必低贱。贵贱的分别，在于行为的美恶。

唯一具有持久重要性的自由是智慧的自由，也就是说，为了本质上值得的目的而行使的观察和判断的自由。