We must be free not because we claim freedom, but because we practice it.

The beauty of mathematics only shows itself to more patient followers.

No man is free who is not a master of himself.

The truth is not always beautiful, but the pursuit of truth is always noble.

"The unexamined life is not worth living."

语言的进化是为了让我们能够闲聊。

真相往往是复杂的，而谎言则总是简单的。