一份不允许我用武力捍卫自己免受攻击的契约总是无效的。

The secret of change is to focus all of your energy not on fighting the old, but on building the new.

In the end, we only regret the chances we didn't take.

Never say never.

我不是一个喜欢在中间的人。

古代著书立说的人，都有卓越的见解而自成一家，后世无法轻易改变。