he is a fool that forgets himself.
1、愚者忘乎所以。
he is a good friend that speaks well of us behind our backs.
2、背后说好话，才是真朋友。
he is a wise man who speaks little.
3、聪明不是挂在嘴上。
every potter praises hit pot.
4、王婆卖瓜，自卖自夸。
everything is good when new, but friends when old.
5、东西是新的好，朋友是老的亲。
example is better then percept.
6、说一遍，不如做一遍。
experience is the father of wisdom and memory the mother.
7、经验是智慧之父，记忆是智慧之母。
experience must be bought.
8、吃一堑，长一智。
fact speak louder than words.
9、事实胜于雄辩。
failure is the mother of success.
10、失败是成功之母。