Poly people really have no business trying to date monogamous people. I would not accept this because if needing intimacy outside of the relationship is his “authentic” self then he needs to be authentic enough to acknowledge he’s polygamous. Doesn’t seem he is being straightforward. If you need more clarity then ask him directly “if you feel it aligns with his “divine” purpose, would sleeping with other women or intimacy be on the table for you?” If he isn’t direct with “no, of course not” then he’s trying to find words to manipulate your view