He believed in God, or at least argued for God's existence. Kant has certainly had an influence on theology. You could see Schleiermacher's whole emphasis on religion as "feeling" as a search for a new way of doing theology after Kant removed God from the domain of what can be known intellectually. And without Kant there's no Hegel, who dominated German-speaking theology for a century. More recently, a number of English-speaking theologians (notably John Hick) have been very excited by the Kantian distinction between reality and our perception of it, though how much their ideas really resemble those of Kant himself is a matter of debate. No, I think it's supposed to be just a roundabout reference to the resurrection.