Missionary Cousin Sent Me A Brad Wilcox Talk

I’ve been out of the church since I was a kid so some things my cousins have sent me have felt weird but I haven’t been able to point out why. This one was particularly confusing. The talk my missionary cousin sent me talked about the grace of Jesus Christ (also is it God’s grace? or Jesus’s? this is confusing to me). It’s called “His Grace Is Sufficient” if you want to look up the whole thing.

Anyway, I’ll include an excerpt here (Wilcox is talking to a BYU student in this part of the talk):

“He [Jesus] paid our debt in full. He didn’t pay it all except for a few coins. He paid it all. It is finished.”

She said, “Right! Like I don’t have to do anything?”

“Oh no,” I said, “you have plenty to do, but it is not to fill that gap. We will all be resurrected. We will all go back to God’s presence. What is left to be determined by our obedience is what kind of body we plan on being resurrected with and how comfortable we plan to be in God’s presence and how long we plan to stay there.”

Is there some Mormon doctrine about unlocking body parts the more obedient you are?? What is the point of having tiered access to God?? Also I know faith vs. works is often debated in Christianity in general, what are y’all’s thoughts on this Mormon take on it?