Al: Satan, to start.
Rn:Angels and men are different creations.. scripture says nothing about angels be given grace ever
How does any creature live in the presence of God except through His grace?
That is your supposition.. is there any scripture that God gives grace to angels?
Now back to the subject..How does a Human (is that better? ) reject the undeserved merit given by a loving gracious God that wants to bestow it?