Could you clarify if sanctification is progressive, or if it is imputed to you upon salvation? [I Peter1:15-16, I Thessalonians 5:23, Romans 8:1, 2 Corinthians 3:18, Romans 6:6].
If we have the capability of not being a "slave to sin" does that mean that we have the power, by grace, to not sin? What if we stumble?[Romans 6:6, 7:14, 24-25, 8:1, 4, Galatians 5:16, Luke 15:11-32, James 3:2].