《资治通鉴·秦纪·秦纪一》
荀况说： 谋虑最关键的是抛弃成败不明的谋划，行动最重要的是不产生过失，做事最关键的是不后悔；事情做到没有反悔就可以了，不必一定要追求尽善尽美。
荀卿曰： 知莫大乎弃疑，行莫大乎无过，事莫大乎无悔。事至无悔而止矣，不可必也。
Xun Kuang said: Planning is most critical for discarding vague plans, action is most critical for avoiding mistakes, and doing things is most critical for avoiding regret. Completing a job with no regrets is enough. It is not necessary to pursue everything being the best.