Self Differentiation, Part Two

When Your Thoughts and Feelings Take Over

The dishes are rarely just dishes. Beneath what couples say is another conversation asking something more important: Are you there?

In the first article on self-differentiation, I looked at marriage through the lens of Bowen family systems theory. Bowen asks us to pay attention to what happens to me when anxiety rises between us. Can I remain connected to my spouse without surrendering myself? Can I hear something I disagree with without immediately arguing, withdrawing, fixing, appeasing, or trying to make the other person change?

There is another way of looking at much the same territory.

Acceptance and Commitment Therapy, or ACT, is not a family systems theory. It approaches human behavior from a different direction. But put Bowen and ACT in the same room for a while and they have some interesting things to say to one another.

Bowen is interested in our ability to remain a self while emotionally connected to other people. ACT is interested in psychological flexibility—our ability to remain in contact with our thoughts, feelings, memories, bodily sensations, and circumstances while still choosing what we do according to what matters to us.

From an ACT perspective, then, one of the things that makes differentiation difficult is fusion. We become fused with what happens inside us.

Your spouse says something. You have a thought about what it means. The thought produces a feeling, or perhaps the feeling arrives first. Your body joins the discussion. Before long there is an entire internal committee meeting underway, and everybody seems to agree that something must be done immediately.

She doesn't respect me.

He doesn't care.

Here we go again.

I knew this would happen.

If I let this go, she'll think it's okay.

If I say what I really think, he'll get angry.

I can't stand being treated this way.

I need to fix this.

The problem is not that these thoughts occur. Minds produce thoughts. That is what minds do. The problem comes when the distance between having a thought and obeying it becomes very small.

ACT calls this cognitive fusion. When I am fused with a thought, I am no longer simply noticing I am having the thought that she doesn't respect me. For those few seconds—or sometimes considerably longer—she doesn't respect me is reality. I respond accordingly.

And marriage gives us plenty of material. Our spouses matter to us. Their opinions matter. Their affection matters. Their disappointment matters. Their tone of voice matters considerably more than the tone of voice of the person standing behind us at the grocery store. Intimacy gives another person access to places in us that strangers rarely reach.

That is part of what makes marriage wonderful. It is also why a raised eyebrow can occasionally accomplish what would require several paragraphs from anyone else.

When Feelings Become Instructions

We can become fused with emotions too. ACT usually talks about cognitive fusion in relation to thoughts, but in ordinary life thoughts, emotions, memories, bodily sensations, and impulses arrive tangled together. Fear does not politely identify itself as an emotion and wait while cognition takes its turn. Anger does not submit an agenda before entering the meeting. We experience the whole thing.

My spouse becomes quiet. I feel anxious. My mind says, Something is wrong. Then, She's angry with me. Then perhaps, I need to find out what it is. So I ask. “Are you okay?” ~ “Yes.” ~ “You seem upset.” ~ “I’m fine.” ~ “You don't seem fine.” Now she is becoming irritated, which confirms my original suspicion that something was wrong. I have successfully produced evidence for my theory.

This is where ACT becomes particularly useful for couples.

The anxiety itself did not require me to pursue. The thought something is wrong did not require investigation. The uncomfortable sensation in my body did not require immediate relief. Those experiences were real, but they were not commands. That distinction is enormous.

One of the most important freedoms we develop in adult relationships is the ability to experience something strongly without automatically organizing our behavior around it.

I can feel rejected without immediately withdrawing.

I can feel anxious without demanding reassurance.

I can feel angry without becoming cruel.

I can feel misunderstood without explaining myself for the seventh time.

I can feel the powerful urge to fix what is happening and choose, for the moment, to leave it alone.

Sound familiar? Yes, this is differentiation, but with a twist. It may sound as though I’m talking about suppressing feelings, but through the lens of ACT it is quite the opposite. Psychological flexibility requires a greater willingness to experience what is actually happening inside us, not less. I don’t have to get rid of the anxiety, anger, hurt, or urge before I can choose what to do. The trick is learning that feeling something and doing something about the feeling are two different events.

The Stories We Bring Into Marriage

This connects directly with the family-of-origin patterns I described in the first article. We do not enter marriage as blank slates. Someone who learned early that conflict threatens relationships may carry a very convincing internal story: If someone I love is angry with me, something is wrong between us. Someone who grew up around unpredictable anger may have learned: Pay attention to changes in tone. Trouble is coming. The person who kept peace in the family may carry: It is my job to make everyone okay. Someone who learned not to depend on other people may carry: Needing people is dangerous.

These stories may contain history. They may once have been remarkably useful. Some may still contain important truth. But ACT does not require us to decide whether they are true or false before we can become less governed by them. That is an important difference.

The question becomes less, Is this thought true? and more, What happens when I become fused with it?

If I am fused with conflict means the relationship is in danger, I may appease my spouse rather than say what I believe.

If I am fused with nobody is going to control me, an ordinary request may feel like domination.

If I am fused with I have to fix this, my spouse's distress becomes a problem I cannot leave alone.

If I am fused with I'm not important to you, I may begin collecting evidence.

And human beings are remarkably good at finding evidence for things they have already decided to look for.

Coming Back to “I”

This is where ACT circles back to differentiation. In the Bowenian article, I described the importance of coming back to “I.” Instead of concentrating entirely on what my spouse is doing, I ask, What is happening in me? What is mine here?

ACT takes us a little farther inside that question.

What thought just showed up? What am I feeling? What is happening in my body? What old story has my mind started telling? What am I suddenly tempted to do? And perhaps most importantly: Do I have to do it?

That last question creates space.

ACT calls the process of loosening our attachment to thoughts cognitive defusion. Defusion does not make thoughts disappear. It changes our relationship with them. Instead of You don't respect me, I begin to notice, I'm having the thought that you don't respect me.

That may sound like a small grammatical trick. Sometimes it is. But psychologically it creates an important distinction between me and something my mind is telling me.

I have a thought. I am not the thought.

I have an emotion. I am not the emotion.

I have an urge to withdraw. I do not have to withdraw.

The younger version of me, the one we talked about in the first article on family-of-origin-patterns, may have entered the room. He simply does not have to chair the meeting. This is an essential distinction, we’ll come back to in a later article titled, “When Your 8-Year-Old Takes Over The Meeting.

Your Spouse Can Still Be Wrong

There is an important caution here. Defusion does not mean assuming that every problem exists inside your own head. Your spouse may actually have behaved badly. They may have been inconsiderate, dismissive, irresponsible, or unfair. Healthy differentiation does not require becoming endlessly serene while another person behaves however they please.

ACT does not ask us to pretend reality is different from what it is.

It asks us to become flexible enough to respond to reality rather than merely react to the internal storm reality has produced—to make enough space in your head to tolerate inevitable distress. That distinction matters.

Suppose my spouse says something hurtful. Fusion may tell me, Attack back. Or Shut down. Or Make her understand exactly how badly she hurt you. Or perhaps Don't say anything; it will only make things worse.

Psychological flexibility gives me another possibility.

I can notice the hurt. I can notice what my mind is saying about the hurt. I can allow the hurt to be present long enough to decide what kind of spouse I want to be in this moment. Then I can respond. That response may be gentle. It may also be firm. “I don't want us to speak to each other that way.”

That is differentiation too.

Values Change the Question

This is where ACT adds something particularly useful to marriage. Once I am no longer completely occupied with making an uncomfortable thought or feeling go away, I can ask a different question: Who do I want to be here? ACT calls our chosen directions values.

Values are not feelings. They are not rules for making our spouse behave properly. They describe qualities we want to bring to our own lives and relationships: loving, honest, faithful, courageous, patient, playful, compassionate, curious, respectful.

Values do not tell me what my spouse should do. They point in the direction I want to head toward; the direction we want to go. Like a compass values tell me which direction is north.

This becomes particularly important during conflict because anxiety has a way of shrinking our world. When I am emotionally fused, my goal can quickly become win this argument, make this feeling stop, prove my point, get reassurance, or get away from you. Those are understandable goals. They may, however, have very little to do with the marriage I actually want.

So ACT introduces a wonderfully inconvenient question in the middle of conflict: If I weren't trying so hard to get rid of what I am feeling right now, what would I do that moves me toward the husband or wife I want to be?

Sometimes that means speaking. Sometimes listening. Sometimes apologizing. Sometimes setting a boundary. Sometimes allowing your spouse to remain disappointed in you. And sometimes it means recognizing that this particular hill does not require anybody to die on it.

Two People, Two Internal Worlds

Marriage joins two lives. It does not join two nervous systems. Your spouse will have thoughts you cannot control, emotions you cannot regulate, memories you cannot rewrite, and reactions you would not choose. You will have the same.

Much marital suffering comes from our attempts to manage this inconvenient fact: We want the other person to think differently so we can relax. Feel differently so we do not have to feel guilty. Stop being upset so we can stop being anxious. Agree with us so we can become certain that we are right.

Differentiation requires more room than that.

From an ACT perspective, it means learning to make room not only for my own internal experience, but for the uncomfortable experience of knowing that you have an internal world I cannot control.

You can misunderstand me. You can disagree with me. You can be disappointed in me. You can think something about me that I wish you did not think. And I can remain here. That may be one of the deepest connections between ACT and Bowen.

Bowen describes the capacity to remain a self while staying emotionally connected. ACT helps explain some of what makes that possible internally. I become less fused with the thoughts and emotions demanding that I change you, change myself, escape the discomfort, or resolve everything immediately.

I learn to make room. And inside that room, I get a choice. And that choice can align with my younger me reaction, or it can align with my values; with what is really important to me.

The Space Between Us Begins With the Space Within Us

Differentiation does not mean becoming less affected by the person we love. Marriage would be terribly thin if that were the goal. Love makes us vulnerable precisely because another person matters. The work is learning to be affected without becoming entirely governed by what happens inside us when we are affected.

I can notice anxiety without handing it the steering wheel. I can hear the old story without automatically entering it. I can feel the impulse to pursue, withdraw, fix, defend, or attack without assuming that impulse knows what is best for my marriage.

That is psychological flexibility.

And perhaps this is where Bowen and ACT finally arrive at almost the same place by different roads. Bowen asks whether I can remain myself while remaining connected to you. ACT asks whether I can remain present with everything happening inside me while still choosing how I want to respond to you.

Both require a little space.

Enough space between your reaction and mine. Enough space between my thoughts and what I believe. Enough space between what I feel and what I do. Enough space for two people to remain two people without losing the us they are trying to build.

In the first article I ended with this:

I can be me. You can be you. And we can keep learning how to be us.

ACT might add one more sentence:

And everything happening inside me does not get to decide what I do next.

© 2026 Thomas Kurtz. All rights reserved.

Published by Thomas Kurtz Counseling, LLC.