Believing Pharisees were subverting men's souls by turning them back to the Law of Moses for righteousness. Beginning with circumcision they added the Law as a rule of life for the Believer. Doing so renders the redemption work of Christ unfinished and dependent upon man. A sinner whose hope was fixed in Christ is made uncertain and dependent upon the flesh rather than the finished work of Christ to save the sinner to the uttermost all that come unto God by Christ. This the apostles rejected. Christ alone is sufficient to save the Sinner.