Somebody said it first.
A child has no way to check most of what it is told about itself. If the people who feed you say you are the careful one and your brother is the bold one, that is not an opinion you weigh. It is the weather. You dress for it. By the time you are old enough to test it, you have twenty years of behaving as if it were true, and the behavior looks like proof.
The research on this is old and blunt. When teachers were told, falsely, that certain children were about to bloom, those children gained more on later tests than their classmates. Nothing about the children had changed. What changed was what the adults expected, and how they behaved because of it.1 The effect ran the other way too, and it still does, in every house where one kid is “the smart one” and the other learns to stop raising a hand.
In the framework’s terms, a learned limit is a Perception Modifier ↗ that has been mistaken for a fact. It was built to explain one moment (a bad grade, a joke that landed wrong, a parent who needed one child to be easy) and it never got taken down. It now runs on every new situation that resembles the old one. You don’t experience it as a filter. You experience it as knowing yourself.
This is the same machinery The Uniform ↗ describes from the other side. The uniform is the self you built to survive a room. The ceiling is the self you were told you couldn’t be. They are stitched from the same cloth, and both were cut to someone else’s measurements.