1:13 power of darkness. The “power of darkness” (note Luke 22:53) is nothing less than the kingdom of Satan, in which we all once were captive slaves. Note, for example, Ephesians 2:1-3. However, we have now been set free from this bondage and carried into a new kingdom of light rather than darkness (note Colossians 1:12).
1:14 through his blood. The blood of Christ shed on the cross in substitution for us who deserved to die was the redemption price necessary to secure our freedom and forgiveness. See also Ephesians 1:7; I Peter 1:18-20.