I could easily forgive his pride, if he had not mortified mine.

The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

Every year of delay makes the problem harder to solve.

理解自然的途径是通过数学的语言。

I sent my Soul through the Invisible, Some letter of that After-life to spell: And by and by my Soul return'd to me, And answer'd "I Myself am Heav'n and Hell.”