You will never reach your destination if you stop and throw stones at every dog that barks.
译文：专门注重修养内心的人每天都会看到自己的不足，专门注重增长见识的人每天都会看到自己的长处。每天看到自己不足的人会逐渐变得有长处，每天看到自己有长处的人会逐渐变得有不足。
Never think that war, no matter how necessary, nor how justified, is not a crime.
行为由当前刺激情境和过去的强化历史决定。
The moment you stop trying is the moment you stop learning.