If you go to sleep after a fight with someone, you may “preserve” those emotions. That’s the finding of researchers at the University of Massachusetts. Scientists showed images (some positive, some negative) to more than 100 people and checked 12 hours later to see which pictures stuck with them. There was a different response depending on whether the person had slept during the 12 hour break or not. Sleeping seemed to protect the emotional response. You can read the details in The Journal of Neuroscience. Other studies also support the idea that sleep enhances emotional memories. If you have trouble sleeping after an upsetting day, it could be your mind’s way of trying to avoid storing that memory. In any case, these findings explain the value of the Bible verse that says, “Let not the sun go down upon your wrath” (Ephesians 4:26).