How is it to have possible religious thinking that is philosophically grounded but rejects the foundation of classical metaphysics and the categories of Necessary Being, First Cause, etc.? How is a philosophy of religious thinking possible after the collapse of metaphysics? This is the fundamental question that Karol Tarnowski considers. This article is a synthetic attempt to follow the road marked out by decisions of faith. The road that the Krakow philosopher follows leads from an initial non-religious belief that life has some value, through a philosophical faith that explores the metaphysical dimension of things and events in the world, to a religious hope for an absolute Good.