A close mouth catches no flies. 病从口入,祸从口出。
A cock is valiant on his own dunghill. 夜郎自大。
A common danger causes common action. 同仇敌忾。
A constant guest is never welcome. 久住非佳宾,常来不欢迎。
A contented mind is perpetual feast. 知足常乐。
A covetous man is good to none but worse to himself. 贪婪的人对别人毫无好处,对自己却坏处更大。
A crafty knave needs no broker. 狡猾的流氓,不需居间人。