Invasion

Love & War, John and Stasi Eldredge (pg. 111)
"But Adam and Eve blew it; they failed to maintain a united front and ran the ship aground. They surrendered the entire beautiful kingdom to the evil one. Satan becomes "the prince of this earth" (John 14:30), not by original intent, but through treachery and deceit. The world now groans under his rule. Like every cruel despot that will come to serve him like a marionette, Satan goes on to ravage the earth and mankind. Then-this would be the cue for trumpets and banners-Jesus shows up. Not gentle Jesus "meek and mild" but a warrior king come to take back his father's kingdom, come to ransom us from darkness and strike a deathblow to the dark prince, pry this world from his wretched grasp.
What we call "Christianity" is an invasion.
The Kingdom of God is advancing into the kingdom of darkness, a campaign to ransom people, and the earth God intended us to rule. For the Son of Man came to seek and save what was lost. All that was lost. If Christianity seems to you to be having rather less than a remarkable impact on the earth, it is because too many Christians have this idea that we are in a waiting game, that we are basically killing time until Jesus comes back and we all get to go to heaven. We are sitting around like people waiting to catch a flight. That is not what Jesus told us to do; he didn't say, "Now hold tight in those pews and twiddle your holy thumbs, I'll be back soon as I can." He said, "As the Father has sent me, I send you" (John 20:21)