Bruce Charlton has been explaining that metaphysics is our assumptions about the world, and what we assume provides the basis of what we can know and understand. To this he attributes many of the problems of the modern world, its assumption of a dead, material universe and I think we can agree on this.
Metaphysics and what proceeds from it, particularly theology, provide us with things to know about the world. People want to know a lot, and they put a lot of effort into this.
But we can also be be secure in that we don’t need to know everything. God knows, and Jesus knows, and they will take care of everything.