The old saying goes; Don't let the sun go down on your anger---
Meaning, don't go to bed if you are in a fight with your partner. But I say HOGWASH. For me, the phrase should be something like:
Don't start some giant paintrain "talk" at 11:30 pm when you are exhausted. Instead, hit the hay and it will look alot more reasonable, approachable and in proportion after you are rested.