A good book exploring this idea is The Great Search by John Philip Newell. He features nine different spiritual luminaries from various World Religions who all share the sense that we are part of something larger than any one tradition, part of the universe itself. The first chapter is about a broad-minded Catholic priest named Thomas Berry who carries forward the work of scientist-priest, Pierre Teilhard de Chardin. Chardin and Berry both explore what it means to have emerged from the universe itself, made of stardust, etc.