Religion points to that area of human experience where in one way or another man comes upon mystery as a summons to pilgrimage.
Pay mind to your own life, your own health, and wholeness. A bleeding heart is of no help to anyone if it bleeds to death.
It is as impossible for man to demonstrate the existence of God as it would be for even Sherlock Holmes to demonstrate the existence of Arthur Conan Doyle.
In his holy flirtation with the world, God occasionally drops a handkerchief. These handkerchiefs are called saints.