Greater Good Science Center explains how forgiveness activates brain networks for emotional regulation, breaks rumination loops, and promotes biological healing through neuroplasticity.
We all carry emotional baggage, grudges, betrayals, wounds that won't heal. But what if holding on to that pain is hurting you more than the person who caused it? I'm Dr. Tracy Marks, a psychiatrist with over 20 years of clinical experience, and I create educational videos to help people strengthen their minds and build emotional resilience. Here's how unforgiveness hurts you. Chronic resentment, which often involves rumination and anger, is associated with a prolonged stress response in the body. Research suggests that it can lead to disregulation of stress hormones like cortisol and increased blood pressure and heart rate, all of which may contribute to long-term cardiovascular strain. Over time, this emotional burden can impact your memory and mood and even weaken your immune system. Forgiveness can help reduce your pain, reactivity, and stress. But let's be clear: it's not about forgetting what happened or condoning harmful behavior or even reconciling with the person who hurt you. You can forgive someone without ever speaking to them again. Forgiveness is primarily an internal process. It's a conscious decision to release resentment for your own peace. Neuroscience suggests that when you forgive, you engage brain networks for emotional regulation and perspective taking and activate calming systems in the body. And this combination is linked to lower anxiety and depression and to fewer rumination loops that keep old hurts alive. You're literally rewiring the pathways in your brain from reactivity to emotional regulation. Forgiveness isn't weakness. It's resilience in action. And this matters deeply whether you're a mental health professional guiding others toward healing, an educator modeling emotional skills, or a faith leader teaching compassion. Forgiveness not only restores our own mental and emotional well-being, it also fosters stronger relationships and healthier communities. And you don't have to start big. Try forgiving the person who cuts you off in traffic or the friend who always runs late. These small everyday annoyances are chances to practice letting go. And like any skill, forgiveness strengthens with repetition. Forgiveness won't change the past, but it changes how the past lives within us.