Circumcision to be saved or faith in Jesus to get saved (See Acts 15:1, Acts 15:5, Acts 15:24, and Galatians 5:2)

Note: I do not approve of slapping others, and I do not encourage anyone to read Batman comics or watch the films. The point here is looking to Scripture to understand the mind of Paul and why he spoke like he did in Ephesians 2:8-9, Titus 3:5, Romans 4:3-5, Romans 11:6, etcetera.