The idea of a God we infer from our experimental dependence on something superior to ourselves in wisdom, power and goodness, which we call God; our senses discover to us the works of God which we call nature, and which is a manifest demonstration of his invisible essence. Thus it is from the works of nature that we deduce the knowledge of a God, and not because we have, or can have any immediate knowledge of, or revelation from him.

Ch. V Section II - Containing Observations on the Providence and Agency of God, as it Respects the Natural and Moral World, with Strictures on Revelation in General - Reason: The Only Oracle Of Man (1784)