《中庸·第十三章》
平常的德行努力实践，平常的言谈尽量谨慎。德行的实践有不足的地方，不敢不勉励自己努力；言谈却不敢放肆而无所顾忌。
庸德之行，庸言之谨；有所不足，不敢不勉；有余，不敢尽。言顾行，行顾言。
Cultivate ordinary virtues and be cautious in ordinary speech. If there is a lack of virtue, do not dare to refuse to encourage yourself to work hard; yet dare not be presumptuous and reckless in speech.