Udderly wasted

D&C 2:3 - Why will the world be utterly wasted at the coming of the Lord without the keys of Elijah? I've read the explanation in Doctrines of Salvation but I don't really remember it. Where is the causal relationship between the powers that Elijah brings and the non-wastage of the world?

D&C 3:1-2 - These verses suggest that God's infrustrationialism is because he doesn't walk in crooked paths. So...does he follow laws so perfectly that noone can stop him? This transfers the power of God over to the laws, doesn't it?

(Funny sidenote: "his paths are straight and his course is one eternal round")

Verse 4 seems to return the power to God. If a man incurs the vengeance of a just God, God is not just a judge in a preset law situation but the dispenser of the law itself. Ooch. Sure we can say he's both but that's like saying nothing at all.

Ok, in verses 5 and 6 it becomes apparent that God is talking to people with which he has entered into a specific contract/covenant, making the whole situation easier. When one is in a contractual situation the other party is given rights both as an originator and executor.

Verse 20: "be glorified through faith in his name, and that through their repentance they might be saved". VERY interesting. Most places in the scriptures it talks of exaltation (glorified) coming through repentance and sanctification and salvation (saved) through faith. This one gives them the other way! Weirdness.