Again there was a day when the sons of God came to present themselves before the Lord, and Satan came also among them to present himself before the Lord ... Job 2 : 1
Sometime ago I came across a picture of a flock of sheep : and among the sheep, there was circled one whose face was that of a wolf - and at the bottom of the picture were the words, "Satan is no longer opposing churches. He is now joining them : that way he gets to sow more tares".
If Satan can get you to continuously do his bidding, he has no reason to oppose the church, because he will already have you as the wolf among sheep in the church. You will become an agent of sin without even realizing it.