兔而顾犬，未为晚也；亡羊而补牢，未为迟也。
解释：看到兔子再回头唤猎狗，还不算太晚；跑掉了羊再去修补羊圈，也不算太迟。
【译文】 孔子说：“年轻人应该孝顺父母，尊敬师长，认真诚信，广施爱心，亲近仁人志士。能轻松做到这些，才可以从事理论研究。”
The thing that is important is the thing that not seen… It is just as it is with the flower。 If you love a flower that lives on a star， it is sweet to look at the sky at night。 All the stars are abloom with flowers…