Probably Old Testament material.
You don't have to believe in the Bible to recognize that there might be a higher being "out there". I used to think exactly the way you do. However I realized that particular belief was cold and lifeless. When you begin to lose those you love, your attitudes change. You go from staunch atheist to spiritual believer in an "Afterlife" and benevolent being. The church is an earthly man made invention with rules and regulations that amount to little. "God" is infinitely large and small and exists in ways the church/Bible can ever grasp and understand.
That sounds like hope more than anything else.
Religion is built around a hope that once, we die, that is not it. It is a hope that praying to a higher something will lead to rewards, and that those who do not think as such will be punished (note that the rewards/punishments are not for right/wrong. Those are irrelevant in the world of religion). A hope that there is some greater thing out there controlling things, that life has an ultimate "reason", that we are not born simply to grow, feed, breed and die.
Do not go through life with the false belief that you are the only one who has lived. We have all watched loved ones die. I've seen many - some ****** out loud to a god, some in silent content that they were going to pass to nothingness.
And do not think yourself the high and mighty because you can see through the eyes of a god. I've no need for a god, but my universe is far from cold and lifeless. The movement of the Milky Way through the dark sky at night, the flash of a rock burning up as it enters our atmosphere, the gaseous shell of a giant star being violently thrust away, the millions of years it takes for a river to cut through rock to form a Grand Canyon, the majestic growths of the redwood forest, the brilliant colors of grains of sand under a microscope, the image of violent volcanic plumes shooting high into the air off the surface of Io as Jupiter with its great red spot slowly drifting in the background, the sound and the feeling and the sight of a pyroclastic flow rushing from an Earth-bound volcano, simply watching three birds play "tag" around the base of a small tree, the rays of the morning sun streaming brilliantly through the thick forest until the dimmest of rays hits the floor giving life to the smaller plants below, the Great Barrier Reef, Mars, the Eagle Nebula - I am able to look at these sights through the wondrous eyes of science and challenge my mind to figure out how they were, how they work, and what they will become.
If that is an empty world, then I do not want yours full of superstition.