Letting go is less about forgetting and more about changing your relationship to what hurts. Whether you’re holding onto a past relationship, a grudge, a mistake you made, or grief that won’t quiet down, the process follows a similar pattern: you stop fighting reality, create distance from the thoughts that loop in your head, and redirect your energy toward what you can actually control. None of that happens overnight, but each piece is something you can practice starting today.
Why Your Brain Holds On
Repetitive, painful thinking isn’t a character flaw. It’s a brain pattern. When you replay an argument, revisit a loss, or mentally rehash something you can’t change, your brain’s default mode network is running. This network activates during self-referential thinking, the internal monologue about you, your past, your identity. In people stuck in rumination, this network becomes overly connected to emotional processing regions, creating a loop where self-focused thought and negative emotion feed each other. The result feels like a thought you can’t put down.
Understanding this matters because it reframes the problem. You’re not weak for struggling to let go. Your brain has literally wired a circuit that makes this thought pattern feel automatic. Breaking that circuit requires deliberate, repeated practice, not willpower alone.
What Holding On Does to Your Body
Chronic emotional stress doesn’t stay in your head. When you hold onto resentment, regret, or unresolved pain for weeks or months, your body stays in a low-grade stress response. Your stress hormone system (the HPA axis) keeps releasing cortisol, and over time, your cells stop responding to it properly. This is called cortisol resistance, and it has a specific consequence: your body loses its ability to turn off inflammation.
Normally, cortisol acts as a brake on inflammation. But when that brake wears out, pro-inflammatory signals like IL-1, IL-6, and TNF keep firing without a counterbalance. This sustained inflammation is linked to immune suppression, cognitive decline, and mood disorders. In other words, the thing you’re holding onto is quietly reshaping your physical health. That’s not a scare tactic. It’s a reason to treat letting go as something worth working at, even when it feels impossible.
Accept What You Can’t Change
The single most powerful skill in letting go is radical acceptance, a concept from dialectical behavior therapy. Radical acceptance doesn’t mean approving of what happened or pretending it was fine. It means stopping the internal war with reality. Marsha Linehan, who developed the approach, outlined a clear process for practicing it:
Start by noticing when you’re fighting reality. The signal is usually a thought like “it shouldn’t be this way” or “this isn’t fair.” Once you catch that thought, remind yourself that the situation is what it is and cannot be undone. Acknowledge that there were causes, a chain of events that led here, even if those causes were unjust.
Then practice accepting with your whole self. Use self-talk that reflects acceptance (“this happened, and I’m here now”), relaxation techniques, or mindfulness. List the behaviors you would engage in if you truly accepted the situation, then start doing those things, even before acceptance fully arrives. The action often comes before the feeling. Allow grief, sadness, or disappointment to surface. Don’t push those emotions away. Acknowledge that your life can still be meaningful even with this pain in it.
If you find yourself resisting, try a simple pros and cons exercise: what do you gain by continuing to fight this reality, and what does it cost you?
Create Distance From Your Thoughts
One reason painful thoughts feel so powerful is that you experience them as facts. “I’ll never be happy again” doesn’t register as a thought. It registers as truth. Cognitive defusion, a core skill in Acceptance and Commitment Therapy, is the practice of creating psychological distance from your thoughts so you can see them as passing mental events rather than concrete realities.
A simple way to start: when a painful thought arises, silently add the phrase “I’m having the thought that…” before it. “I’ll never get over this” becomes “I’m having the thought that I’ll never get over this.” It sounds small, but it shifts you from being inside the thought to observing it. Over time, this trains your brain to treat thoughts as weather, something that passes through rather than something that defines you.
The NHS recommends a related technique called “catch it, check it, change it.” When you catch an unhelpful thought, check it by asking: How likely is this outcome, really? Is there solid evidence for it? What would you say to a friend thinking this way? Are there other explanations? Then see if you can reframe the thought into something more neutral and grounded. You’re not forcing positivity. You’re testing whether the thought holds up under honest examination.
Separate What You Control From What You Don’t
The Stoic philosophers built an entire practice around one insight: most of your suffering comes from trying to control things that aren’t yours to control. Other people’s actions, the past, outcomes you can’t guarantee. The exercise is simple enough to do every morning. Write down one thing you’re afraid of or desperately want. Then divide it into two columns: what’s inside your control (your effort, your choices, your response) and what’s outside it (other people’s behavior, chance, what already happened).
This isn’t about passivity. It’s about redirecting energy. When you catch yourself ruminating about someone who wronged you, the question becomes: what can I actually do here? You can set a boundary. You can choose how much access this person has to your life. You can decide what kind of person you want to be going forward. You cannot make them apologize, understand your pain, or change who they are. Letting go often starts the moment you stop waiting for something from someone who isn’t going to give it to you.
Release Stress Through Your Body
Emotional pain doesn’t live exclusively in your mind. It settles in your shoulders, your jaw, your chest, your stomach. Body-based practices can help discharge stored tension in ways that purely mental strategies sometimes can’t reach.
Johns Hopkins recommends several somatic self-care approaches: grounding exercises that release tension from the feet up, breath-based practices that use effortful exhales to wake up the senses and let go of held stress, and guided imagery techniques that help you sense and release the physical and emotional weight you carry. Even simple practices like progressive muscle relaxation (tensing and releasing each muscle group) or slow, deep breathing with extended exhales can interrupt your body’s stress response and signal safety to your nervous system.
You don’t need a formal program. Five minutes of paying attention to where you hold tension, breathing into that area, and consciously softening can make a noticeable difference, especially when combined with the mental practices above.
How Forgiveness Actually Works
If what you’re letting go of involves someone who hurt you, forgiveness may be part of the process. But forgiveness is widely misunderstood. It doesn’t mean reconciling, excusing, or forgetting. Psychologist Robert Enright’s forgiveness model describes it as a four-phase journey that starts not with compassion, but with anger.
In the first phase, you confront your anger directly. You explore and express the hurt, bitterness, and resentment. This isn’t wallowing. It’s honest inventory. In the second phase, you make a conscious decision to begin changing your stance toward the person who hurt you. This is a commitment to start the process, not a demand that you feel differently right away. The third phase involves the harder work: trying to understand the person who hurt you and developing some compassion for them, even a small amount. In the final phase, something shifts. You begin to experience a genuine release from the anger and hurt. Many people in this phase report finding unexpected meaning in their suffering or a deeper sense of purpose.
The key insight is that forgiveness is sequential. You can’t skip to the release without doing the uncovering and deciding first. And the whole process serves you, not the person who caused the pain.
How Long It Takes
There’s no universal timeline, but research on stress habituation offers some useful benchmarks. Your nervous system adapts to repeated stressors more quickly when the exposure is frequent and predictable. In stress research, more than eight deliberate exposures to a stressor were typically required before the body’s stress response fully habituated. Daily practice produced the fastest adaptation, while infrequent practice (once a week) barely moved the needle.
What this means practically: if you’re working on letting go, daily engagement with these skills matters far more than occasional effort. A few minutes each day of acceptance practice, thought defusion, or body-based release will reshape your stress response faster than a single long journaling session once a week. Stronger emotional wounds take longer. The loss of a long relationship or a deep betrayal won’t resolve in the same timeframe as a workplace slight. Individual differences matter too. Some people habituate quickly, others need more time, and both are normal.
The encouraging finding is that adaptation does happen. Even after a break from practice, the benefits partially persist. In studies where subjects returned to a stressor after 20 days away, their stress responses were still lower than they had been at the beginning. Your effort accumulates even when progress feels invisible.
Putting It Together
Letting go isn’t a single action. It’s a collection of skills practiced repeatedly until your default patterns shift. Start by noticing when you’re fighting reality and practice radical acceptance. When thoughts loop, create distance by observing them rather than believing them. Redirect your energy toward what you can control. Move your body to discharge stored tension. If forgiveness is part of your situation, let it unfold in stages rather than forcing it.
Acceptance and Commitment Therapy frames the goal not as eliminating pain, but as building psychological flexibility: the ability to hold difficult thoughts and feelings without being controlled by them, while still moving toward a life that reflects your values. That’s what letting go actually looks like. Not the absence of pain, but the freedom to act meaningfully despite it.