You're in the same meeting. Your colleague brushes off a critical comment from the manager and moves on without a second thought. You, on the other hand, are still turning it over hours later, replaying the tone, the words, the look on their face.
Same room. Same moment. Completely different experience.
This isn't a mystery, and it isn't about one of you being "too sensitive." It comes down to something far more specific: core sensitivities.
We all have them
Core Sensitivities are the particular relational vulnerabilities each of us carries. They are the themes that, when activated, shape how we feel, how we behave, and how we experience the people around us, often without us realizing it.
For some of us, they hum quietly in the background and only occasionally break through. For others, they are a much more constant presence, running beneath everyday interactions and shaping how we read people, situations, and relationships in ways we may never have had a name for.
The Circle of Security model, developed from decades of attachment research, identifies three core sensitivities. Most of us will recognize something of ourselves in all three, but tend to carry one more deeply than the others.
Esteem sensitivity
For some people, what matters most in a relationship is being seen positively: as capable, worthy, good enough. When that sense of esteem feels threatened, the reaction can be strong and fast, even if the trigger seems small from the outside. A passing comment, a raised eyebrow, a tone that didn't quite land right.
People who are esteem sensitive aren't fragile. Often they are high achievers, deeply conscientious, driven by a desire to show up well. The challenge is that so much energy can go into managing how they're perceived that the relationship itself, the actual other person, can get lost in the process.
Safety sensitivity
For others, the most important thing is a sense of self that stays intact within a relationship. Closeness is wanted, genuinely, but when it arrives it can also feel like too much, like being asked to give something up.
People who are safety sensitive might find themselves pulling back just as a relationship deepens, or feeling a vague unease they can't quite name when someone needs more from them. It's not distance they're after. It's a sense that they can be close without disappearing.
Separation sensitivity
And for others still, what drives everything is keeping the relationship close. The idea of distance, a partner who seems distracted, a friend who takes a while to reply, any hint that the connection might be loosening, can feel genuinely alarming.
People who are separation sensitive will often do a great deal to hold a relationship together, sometimes at real cost to themselves. The fear underneath isn't dramatic or irrational. It's simply the deep, learned conviction that closeness is fragile and loss is always possible.
Why it matters to know your own
Understanding your core sensitivity isn't an exercise in self-diagnosis. It's an invitation to understand something that has probably been quietly shaping your relationships for most of your life.
Core sensitivities aren't describing what we do. They're describing why we do it. Two people can behave in almost identical ways and be operating from completely different places. Someone who is esteem sensitive and withdraws after conflict is protecting their sense of worth. Someone who is separation sensitive and does the same thing may be managing a fear that the relationship is already slipping away. The behavior looks similar. The internal experience is worlds apart.
When we don't understand our own sensitivity, we tend to respond from inside it without knowing we're doing so. We set up unspoken rules. We interpret other people's behavior through the lens of our own particular fear. We can spend years in the same relational patterns, the same arguments, the same stuck points, without ever quite understanding why.
When you can see it, something shifts
Awareness creates just enough distance from the feeling to make a different choice. Instead of reacting from inside the fear, you can start to respond to what's actually in front of you.
It also changes how you see other people. So much relationship friction isn't really about the surface content of a disagreement. It's about two people interpreting the same moment through completely different lenses, each one quietly protecting against a fear the other can't see. Our core sensitivity shapes not just how we feel but how we read what's happening: what an event means about our connection, about our worth, about whether we are safe. When you can see that process in yourself, it becomes easier to extend that same curiosity to the other person, to wonder what the moment might have meant to them, rather than simply defending against what they've said.
The Circle of Security framework offers a way into this kind of understanding that is grounded, practical, and genuinely compassionate. Core sensitivities are just one part of a much richer picture of how we relate, and how we can relate better. But they're a remarkably useful place to start.
If something here has resonated, if you've caught a glimpse of yourself in one of these patterns, that recognition is worth following.
For COSP Facilitators: go deeper with your own Shark Music
Knowing yourself and your defenses is some of the most useful preparation you can bring to facilitation. If you're a Registered COSP Facilitator and this post has stirred something, there are two places to take it further.
Shark Music and the Core Sensitivities links Shark Music and Limited Circles directly to the Core Sensitivity framework, helping you recognize predictable patterns in your own relationships — and supporting the caregivers you work with to do the same.
Learn more about Shark Music and the Core Sensitivities.
For a longer, more personal exploration, The Human Condition: A Journey Through the Core Sensitivities with Kent Hoffman goes further still — hours of video learning, interactive journaling, discussion board participation, and live sessions with a guide and fellow participants. Many facilitators take both courses in sequence, finding that the self-understanding from the deeper dive opens up fresh ways of seeing their clients.
