It seems clear from Luke 22:31-32 that Satan is “on a leash.” He cannot go beyond what our sovereign God will allow him. We see this not only in Luke 22 but also in the Book of Job where Satan had to obtain permission from God before afflicting Job (see Job 1:9-12).
Earth is chock full of people who think they can just wait till they get old, when they think giving up earthly delights and sins of the flesh will be easier to give up. Full of health and vigor, they aren’t about to give up anything while they can still have “fun.” The church teaches us that this isn’t they way to go, as the yoke of sin isn’t easy to give up even then. It gives us the tools to fight sin right now, which is the best way to go of course.
Satan knows all of this of course. Even though bedside conversions are not a sure bet every time, he still doesn’t like even those odds. Satan desperately hates us, as God’s creations. He isn’t happy with his plight, even though it is of his own doing.
Given the chance, Satan would wipe us off earth RIGHT NOW. After all, a bird in hand is worth two in the bush. God wants to give us every chance to get in his good graces, he even gave us his only beautiful sinless Son to make that possible. He is willing to endure all of our actions and blasphamies in hope that we will change, and many do. Not enough, but many do.
The fact that I a horrible sinner, who is in the long process of conversion, and you are reading this is proof that Satan does indeed need God’s permission to attack us. Often, over time, these attacks themselves bring about our conversion. Sadly, sometimes God in his mercy sees that we will only get worse, and in his mercy will allow Satan to take us, so our position in hell will not be any worse than it would be at that moment.
Sometimes God allows us to be taken to prevent something dreadful coming our way, never sees us. Sometimes he takes people to eternal bliss to bring about the conversion of those who would otherwise see damnation. Sometimes things happen that make no sense at all.
The Lord of the flies is indeed powerful, but God does circles around him, every day. Having to ask permission, which often serves the purposes of God is humiliating to the devil, but he does in fact, have to have permission, or we would all be dead.