The theologian and Bible teacher R.C. Sproul wrote, “Sin is cosmic treason. Sin is treason against a perfectly pure Sovereign. It is an act of supreme ingratitude toward the One to whom we owe everything, to the One who has given us life itself.” Those who commit treason against a country or a state are essentially enemies of the state. In Colossians 1:21-23, the apostle Paul tells us that we were enemies of God before He reconciled us through the death of His Son, Jesus Christ. We expressed that enmity in the sins we committed against Him. Those sins separated us from God, but Jesus came to die for our sins, and therefore remove the source of our alienation. He made peace through the blood of His cross (vs.20)! We were once the enemies of God, but now through faith in Christ we have become His friends!
Therefore, having been justified by faith, we have peace with God through our Lord Jesus Christ (Romans 5:1).
For if when we were enemies we were reconciled to God through the death of His Son, much more, having been reconciled, we shall be saved by His life (Romans 5:10).