Your ceiling is mostly a sticky note someone else wrote.

Limits get assigned early and casually. A teacher’s estimate, a remark about which sibling is the clever one, a coach who ranked you at fourteen and never looked again. None of that was measurement, and all of it gets treated as measurement afterward, mainly because you were the one carrying it around.

Name the ceiling you assume is yours, and work out who put it there. Then test it once this week, in some small way. Hardly anyone ever runs the test, which is the only reason the note stays up as long as it does.