Why "forgive and forget" doesn't work
The phrase "forgive and forget" sounds beautiful, but that's not how the brain works. If we have been wronged, betrayed or treated unfairly, the memory itself usually doesn't go away. We can remember what happened, who did it and how we felt at the time.
A new study explains why this is the case. Forgiveness doesn't erase a memory like an eraser. Rather, it changes how the memory feels now. A person may remember the event, but it becomes less poignant and triggers less anger, pain or desire for revenge.
The psychologists' work is published in the journal Emotion. In it, scientists tested how forgiveness affects the memory of an unpleasant act of another person. The main conclusion is simple: to forgive does not mean to forget. It means to build the unpleasant experience into the memory in a different way.
The details
The researchers conducted a laboratory experiment with 23 volunteers. The participants were shown unpleasant images and told that these pictures were supposedly chosen for them by another person. In this way an artificial situation was created: the participant could perceive the choice as a deliberately unpleasant act.
It was then explained to the participants that one of these people had a reason for choosing such images and apologised. The test subjects were asked to try to forgive him or her. The other person was simply to continue to be perceived without forgiveness.
The next day, participants rated the same images again. The pictures associated with the "forgiven" person were perceived as less unpleasant than before. And the images associated with the person the participants had not forgiven did not soften as noticeably.
Simply put, the brain did not delete the memory. Participants still saw the same images. But a new context was added to some of the memories: "this person explained his action", "he apologised", "I tried to forgive him". This made the unpleasant event feel a little less painful.
Brain scans showed that areas related to memory and trying to understand the other person's intentions were switched on during forgiveness. This supports the idea that forgiveness doesn't just "switch off" emotions, but renews the memory: new information is added to the old situation.
Why it matters
The research helps explain why the advice to "just forget" usually doesn't work. We don't choose to erase the memory of a painful event. Especially if it was important, unfair, or related to a loved one.
But a memory is not a photograph that stays the same forever. When we recall an event, it can take on new meaning. If a person sees remorse, understands the circumstances, or internally lets go of some of the anger themselves, the memory can become less heavy.
This does not mean that forgiveness necessarily leads to reconciliation. It is possible to forgive and not return to the relationship. You can stop living in constant anger, but still keep your distance. Especially when it comes to violence, pressure, repeated harm, or unsafe relationships.
So the main conclusion is not that "you have to forgive everyone." The conclusion is that forgiveness, if the person is ready for it, can reduce the emotional pain of the memory without erasing the fact that it happened. A review of research also links forgiveness to higher subjective well-being and fewer negative emotions, but that doesn't make it a universal prescription for all situations.
Background
Psychologists have long studied the link between forgiveness, emotions, and memory. Earlier studies have shown a similar effect: people remember forgiven offences about as clearly as unforgiven ones, but experience less negative emotion when remembering. So it's not so much the content of the memory that changes, but its emotional power.
This explains well why "forgive and forget" is the wrong formula. It would be more accurate to say: forgive and stop experiencing it so acutely.
That said, forgiveness is a process, not a button. It can involve time, distance, talking, apologising, reassessing the situation, support from others or a personal decision not to hold on to the offence any longer. In philosophical and psychological writings, forgiveness is often described precisely as the reduction of strong negative emotions towards a person or event, rather than the complete disappearance of a memory.
Source
Songzhi Wu et al, "Forgiveness updates interpersonal memories to be less negative," Emotion, 2026.
In the study, the authors tested how forgiveness affects the emotional evaluation of unpleasant memories. Participants in a laboratory setting associated unpleasant images with the actions of another person, and then some of those actions were followed by an explanation and apology. After attempting to forgive, these memories were perceived less negatively the next day.