. A bosom friend afar brings a distant land near. 海内存知己，天涯若比邻。
. A common danger causes common action. 同舟共济。
. A contented mind is a continual / perpetual feast. 知足常乐。
. A fall into the pit, a gain in your wit. 吃一堑，长一智。
. A guest should suit the convenience of the host. 客随主便。
. Clumsy birds have to start flying early. 笨鸟先飞。
. Courtesy costs nothing. 礼多人不怪。
. Custom makes all things easy. 习惯成自然。
. Desire has no rest. 人的欲望无止境。
. Difficult the first time, easy the second. 一回生，二回熟。
. Do not change horses in mid-stream. 别在河流中间换马。
. Do not have too many irons in the fire. 贪多嚼不烂。
. Do not pull all your eggs in one basket. 别把所有的蛋都放在一个篮子里。(不要孤注一掷。)
. Do not teach fish to swim. 不要班门弄斧。
. Never hit a man when he is down. 不要落井下石。
. Never judge by appearances. 切莫以貌取人。
. No fire without smoke. 无风不起浪。
. Nurture passes nature. 教养胜过天性。
. One is never too old to learn. 活到老，学到老。