If you exist, you belong to the cult of Being, one of the priesthood of Those Who Are. All being is supreme, there is no need for a belief in a God or any other deities to fill the role of a Supreme Being. The “Supreme Being” is Existence itself, and as you are a participant in Existence, you are an atom of the Supreme Being. Thus do the great mystics cry, “Atman is Brahman”. Self is All. Thou Art Lord.