经验是一所好学校，但学费很高。
Experience is a good school, but the fees are high.
智者虽然很善于谋划，但是不如能抓住时机。
语言中最具破坏性的一句话是：“我们一直都是这样做的。”
Mental phenomena can only be understood in terms of their consequences for action.
There will always be things we wish to say in our programs that in all known languages can only be said poorly.
仁义、礼仪、智慧、诚信，这些都是仁的表现。