The only real mistake is the one from which we learn nothing.
唯一真正的错误是我们从中一无所获的错误。
States are rational actors that seek to maximize their power and security in an anarchic international system.
The only way to do great work is to love what you do.
You may have to fight a battle more than once to win it.
如果心没有妄念，一切法都不会生起。