In our reasonings concerning matter of fact， there are all imaginable degrees of assurance， from the highest certainty to the lowest species of moral evidence.

我们要敢于梦想，敢于实践，敢于失败，敢于成功。

Remember, if you ever need a helping hand, you'll find them at the end of each of your arms. As you grow older, you will discover that you have two hands, one for helping yourself, the other for helping others.

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