默而识之,学而不厌,诲人不倦,何有于我哉。
【译文】将知识默记在心,学习时,不感到满足,教人时,不感到倦怠,这三方面我做到了哪些呢?
所以君子严于律己、宽以待人,而平庸的人却宽以待己、严于律人。 
To live is to be constantly surprised by the unexpected.