He reigned with God..and talk about your guaranteed place in heaven and he fell..so OSAS talk is interesting. Yet satan was a being created by God for worship and we were created to love Him.
We are created to love a being that is fickle from the word go?
A devil’s point of view would be that it would not matter what you did, you could save yourself.
NOT, that God has the sovereign power to lock your salvation in.