1.牵一发而动全身。
A little leak will sink a great ship.
2.情人眼里出西施。
Beauty is in the eye of the beholder.
3. 鹬蚌相争,渔翁得利。
Two dogs fight for a bone, and a third runs away with it.
4.上梁不正下梁歪。
A crooked stick will have a crooked shadow.
5.知错能改,善莫大焉。
A fault confessed is half redressed.