What is IFS therapy? A plain-language guide to parts work.

Here is the thing that changed everything for me about parts work: the parts of myself I struggled with most were not flaws. They were protectors. Every one of them had, at some point, learned a behaviour in an effort to keep me safe. The trouble was that nobody had ever told them the emergency was over. They were still running an older version of my life — still guarding doors that no longer needed guarding, still bracing for things that were no longer coming.

They were only trying to serve. They were doing their absolute best. And they were exhausted.

When my own work with self-compassion met this idea, something clicked into place. Because if the parts of me I had spent years fighting were actually loyal, tired protectors, then the way forward was never going to be discipline or self-criticism. It was going to be something much closer to gratitude. Learning how to release and relax those parts — to thank them, update them, and let them rest — was one of the most profound experiences of my own inner work.

That, in essence, is Internal Family Systems. Let me walk you through it properly.

You contain multitudes — and that is not a problem

Internal Family Systems, or IFS, was developed by psychologist Richard Schwartz in the 1980s. Working with clients, he kept noticing that people naturally spoke in parts: "part of me wants to leave, but another part is terrified." Rather than treating that as a figure of speech, Schwartz took it seriously — and built an entire model of the mind around it.

The core idea is this: the mind is not one uniform thing. It is more like an inner family — a system of distinct parts, each with its own perspective, feelings, memories, and job. Having parts is not a disorder or a sign of brokenness. It is simply how minds work. What varies is how well the system is getting along.

And the model's most radical claim, right there in the title of Schwartz's best-known book: there are no bad parts. Even the parts driving the behaviour you hate most — the procrastination, the perfectionism, the shutting down, the lashing out — took on those jobs for protective reasons, usually a long time ago, usually when you had far fewer options than you do now.

The inner family, roughly mapped

IFS describes a few broad roles that parts tend to take. Real inner systems are messier than any diagram, but the map helps:

And then there is the centre of the model: the Self. Not another part, but who you are underneath all of them — the calm, curious, compassionate presence that IFS believes exists in every person, undamaged, no matter what has happened. If you have read my post on the nervous system's three states, you will recognize its flavour: Self feels a lot like the grounded, connected state your body settles into when it finally registers safety.

Why your parts are running old software

Here is the piece that moved me most, and the reason parts work pairs so naturally with self-compassion. Parts take on their protective jobs at specific moments in your history — often in childhood, when their strategies genuinely were the best available option. Going quiet really did keep the peace. Achieving really did earn love. Numbing really did make it bearable.

But parts are loyal, not current. Nobody sent them the update. So a strategy that made perfect sense at nine years old is still running at thirty-five, activating in situations that only faintly rhyme with the original one. The part is not malfunctioning. It is functioning perfectly — for a life you no longer live.

When I finally understood this about my own parts, the self-criticism I had aimed at them for years started to feel absurd, like yelling at a night guard for still patrolling a building that had long since been made safe. The guard was not the problem. The guard was tired. What the guard needed was to be noticed, thanked, and gently told what year it was.

What actually happens in IFS therapy

An IFS session looks less like analyzing your problems and more like getting to know your inner system. With a therapist's guidance, you learn to notice a part when it is active, get curious about it rather than fused with it, and begin a genuine relationship with it. You might ask a part what it is afraid would happen if it stopped doing its job — the answers are often heartbreakingly protective. Over time, and never by force, protectors begin to trust the Self enough to relax, which eventually allows the deeper healing work with the exiled parts they were guarding.

Nothing is bullied out of existence. No part is amputated. The goal is a system where every part is known, appreciated, and freed from a job it took on under duress — released, as I experienced it, into rest.

If some of this echoes my post on couples and the adaptive child, that is no accident: the protective younger self that grabs the wheel mid-argument is, in IFS language, a part doing its old job. And the way trauma processing can finally update a stuck pattern — what I described in my EMDR post as a system update — is very much the same territory approached through a different door.

If you take one thing from this: the next time you catch a part of yourself doing the thing you wish it would not do, try one different move. Instead of criticizing it, ask it what it is protecting. You may find, as I did, that there was never an enemy in there at all — just a tired, devoted guard who has been waiting a very long time for someone to say thank you, and to let it finally rest.

Hilary McKee is an emerging psychotherapist completing her MA in Counselling Psychology at Yorkville University, and the Co-Founder and CEO of P.A.T.H. Therapy. She writes about therapy, the nervous system, and the work of healing. Her practice opens in Vancouver in January 2027, offering in-person and virtual sessions across British Columbia and Canada.