The Book Power of Darkness and Revelations for Overcoming Them discloses that everything in the Kingdom of God lines itself up with God, for it is His domain. This same alignment occurs in the Kingdom of Darkness. In that kingdom, everything lines up with Satan. The very nature of the Kingdom of Darkness is adversarial. "Adversary" means "one that contends with, opposes, or resists." Any time the Kingdom of God begins to move or we begin to move with God, the Kingdom of Darkness immediately raises up to "contend, oppose, and resist" both us and God. Our preparedness for a fight because of obedience turns life's situation into God's Spiritual Gym. We enter into "resistance training" that develops maturity and spiritual muscle in our lives.