I cannot be your friend and your flatterer too.
朋友不能阿谀奉承。
If a man deceives me once, shame on him, if he deceives me twice, shame on me.
上当一回头，再多就可耻。
If a thing is worth doing it is worth doing well.（如果事情值得做就值得做好。）
If you make yourself an ass, don't complain if people ride you.
人善被人欺，马善被人骑。
If your ears glow, someone is talking of you.
耳朵发烧，有人念叨。
If you run after two hares, you will catch neither.
脚踏两条船，必定落空。
If you sell the cow, you sell her milk too.
杀鸡取卵。
If you venture nothing, you will have nothing./ Nothing brave, nothing have./ Nothing venture, nothing win.
不入虎穴，焉得虎子。
If you want knowledge, you must toil for it.
