There are other threads on questions involving freewill (and/or predestination), and the origin of Satan.
This question is only for Universalist and non-universalist Christians who believe in rebel spirits.
Most of us define God as the ground and source of all being.
And C.S. Lewis (a mere man) said “…there is a difficulty about disagreeing with God. He is the source from which all your reasoning power comes: you could not be right and He wrong any more than a stream can rise higher than it’s own source. When you are arguing against Him you are arguing against the very power that makes you able to argue at all: it is like cutting off the branch you are sitting on.”
(Mere Christianity, pg. 48.)
If this is the true definition of God, and Satan and his angels know Him as the ground and source of all being, wouldn’t they know that nothing they do could possibly thwart His purposes, and that all their efforts must end up serving His plan?
Why then would they bother fighting God, tempting men, planting false doctrines in the Church, planing and sceeming, etc.?
And doesn’t James 2:19 imply that they do in fact know that there is a Supreme Being who is the ground and source of all being?
**Thou believest that there is one God; thou doest well: the devils also believe, and tremble. **
If they know that, and they have even average human intelligence, wouldn’t they know that they’re wasting their time?