要知自家是君子小人,只须五更头 ① 检点 ② ,思想的是什么便得。
① 五更头:五更是凌晨三时至五时。泛指一大清早。
② 检点:此处指自我检讨。
要想知道自己是君子还是小人,只消清晨醒来自我反省一下,检查一下脑子里在想些什么,便一清二楚。
To affirm if you yourself are a noble man or a mean fellow, you only have to examine yourself early in the morning when you wake up. The answer just lies in what you are thinking about or desiring for.