I haven’t over-analyzed these thoughts for theological accuracy, but I think we do a disservice to some who struggle with Anxiety when we don’t nuance what we mean when we say “anxiety is a sin.” Misinterpreted application of “anxiety is a sin” can encourage some people to create “safe lives” where they avoid risking for God in order to avoid anxiety.
True, the bible says…”do not be anxious about anything” but then it says “in everything…present your requests to God” Phil 4. Peace comes when we run to God in the tension not when we run from the tension to avoid anxiety. God promises to be near when we are afraid. It’s His presence that brings peace not an absence of fearful things.