Alex asked this question in another post:
Why can’t God share His divine nature? How does it take away from God’s godness? Does God cease to be God if he can endow us with the nature that He has?
I think this is an excellent question for a Mormon to ask an Evangelical. It forces both of us to get at our fundamental difference in our view of God. Mormons believe the difference between God and Man is one of degree, not kind. Evangelicals believe the opposite, that God stands utterly unique as the only uncaused-cause.
When Evangelicals approach Alex’s question we don’t see God as being stingy with his deity. We don’t think he’s holding on to something for himself just to make sure he’s unique or superior. It has more to do with God’s inability to fulfill the request.
“What’s that you say? Evangelicals believe that God isn’t all powerful? I thought God could do anything?” Evangelicals believe that God can do anything possible. There are plenty of impossible things God cannot do because they are nonsensical. For example, God can’t make a square circle. The adjective “square” is in direct opposition to the noun “circle”. There can never be square circles because we’re making a category fallacy to even suggest such a thing. Similarly God cannot tell you what the color red smells like. Nor can God make you, a created being, into a non-created being. Once you’ve been created, that’s it, there’s no possibility of calling you uncreated.
God simply cannot share his divine nature with the non-divine. God does share with us, generously, everything he can. He loves to include us in his character, his love, his grace, his peace and his glory. But he cannot give what cannot be given just as we cannot eat a piece of π.
As an example let’s suppose Alex wants to share his nature as an “Alex” with his wife. He can invite her into his life, share everything he owns, make joint decisions with her, count her as a part of his successes and failures, and make her fundamental to every aspect of his lifestyle, yet she will never be Alex. She can’t be an “Alex” because only Alex is an “Alex”. It’s not a question of if Alex would diminish as a good “Alex” or cease to be an “Alex”. She may protest that Alex is holding something back and not giving her everything he has, but the nature of “Alex” is not something Alex can give. Though he may try, she will never have the Alex-nature. She cannot be an “Alex” any more than a diesel engine can be an “Alex”.
Mormons think of God and man in a different way. For them, God and man, at our simplest forms are both non-created “intelligences” which are formed into men and progress into divinity. Divinity isn’t a fundamental characteristic so much as a status. God can share his divinity in the same way a Father can share his business. For Mormons the divine essence of God is something men already possess. God doesn’t share it, so much as provide men with a means of reaching their potential.