Pro 17:13 Whoso rewardeth evil for good, evil shall not depart from his house.
Pro 17:14 The beginning of strife is as when one letteth out water: therefore leave off contention, before it be meddled with.
Pro 17:15 He that justifieth the wicked, and he that condemneth the just, even they both are abomination to the LORD.
Pro 17:16 Wherefore is there a price in the hand of a fool to get wisdom, seeing he hath no heart to it?
Pro 17:17 A friend loveth at all times, and a brother is born for adversity.
Pro 17:18 A man void of understanding striketh hands, and becometh surety in the presence of his friend.
I like the imagery in verse 14, as it describes water flowing free from a container or perhaps from a dam of some sort. Once it starts, it won't stop. Strife is similar, in that once it starts, it does not stop. It just gets worse and worse. And so the advice is simply just not to go there. Don't let out the water. Let it go, and be on your way.