Our Lord Jesus Christ's dominion over the devil should be a cheering thought to all true Christians. Without it, indeed, we might well despair of salvation. To feel that we have ever near us an invisible spiritual enemy, laboring night and day to compass our destruction, would be enough to crush our every hope, if we did not know a Friend and Protector. Blessed be God! The Gospel reveals such a One. The Lord Jesus is stronger than that "strong man armed," who is ever warring against our souls. The Lord Jesus is able to deliver us from the devil. He proved his power over him frequently when upon earth. He triumphed over him gloriously on the cross. He will never let him pluck any of His sheep out of His hand. He will one day bruise him under our feet, and bind him in the prison of hell. (Rom. 16:20; Rev. 20:1, 2). Happy are they who hear Christ's voice and follow Him! Satan may vex them, but he cannot really hurt them! He may bruise their heel, but he cannot destroy their souls. They shall be "more than conquerors" through Him who loved them (Rom 8:37).~ J.C. Ryle
Expository Thoughts on the Gospels: Luke volume 1, [Carlisle, PA: Banner of Truth, 1986], 269. {Luke 8:26-36}

Revelation 21 and 22 present heaven as the opposite of hell. Hell is separation from the gracious presence of God; heaven, living in that presence. Hell involves terrible pain; heaven, unceasing joy. Hell means the darkness of banishment from God’s glory; heaven, basking in its light. Hell consists of everlasting rejection by God; heaven, being His son or daughter forever. Hell entails the second death; heaven, eternal life.-Robert A. Peterson. Hell on Trial: The Case for Eternal Punishment, P&R Publishers, 1995, p. 220.