Yes, I think there may be an interesting similarity with everything in nature, including the human mind. Anything of nature seems to contain all possibilities.

Jung was interested in Christianity from a less conventional perspective, being so fascinated by Gnosticism. I'm still not totally sure how he understood some of these terms. He sometimes seems to believe in a fairly traditional if not unknowable, mysterious God but others have suggested he sees God as an archetype of the integrated self or the collective unconscious. I'm not expert enough to claim to know.

Personally speaking though, I would argue that there is an ineffable spiritual aspect to existence that we can call God but that perhaps the mythology of Christ serves as the archetype of a human ideal. So in that sense perhaps Christ does represent a truly integrated self.