The word "boundaries" has been worn down by overuse. The implied promise in most content is that boundaries are simple — once mastered, they solve a substantial portion of relational difficulty. The trouble is that something in you, often something old, makes the actual setting of one feel impossible. The work of changing this isn't really learning what to say. It's learning to tolerate what your body does when you've said it.

Most people, when they describe their tendency to over-apologize, over-explain, smooth things over, or say yes when they meant no, frame it as a personality flaw. They've decided they're "too nice," "a pushover," "bad at boundaries." What's actually happening isn't a personality flaw. It's a sophisticated nervous system strategy that worked, often very well, in the conditions that produced it. And like other survival responses, it doesn't change through willpower.