A blog post worth your time by Trevin Wax, “Why Worrying is a Failure to Grasp the Gospel.” Below is a quick quote.
But seeking first the kingdom comes after we have been sought by the King. The root cause of worry is not misplaced priorities. It’s misplaced faith. It’s a failure to grasp the gospel of a God worthy of our trust.
So worry shows up whenever my view of God is diminished and my view of myself gets too big. I worry because my vision of God is skewed. I rest when my vision is fixed.