Galatians 2:14-16

But when I saw that they were not maintaining a steady, straight course according to the Message, I spoke up to Peter in front of them all: “If you, a Jew, live like a non-Jew when you’re not being observed by the watchdogs from Jerusalem, what right do you have to require non-Jews to conform to Jewish customs just to make a favorable impression on your old Jerusalem buddies?” We Jews know that we have no advantage of birth over “non-Jewish sinners.” We know very well that we are not set right with God by rule-keeping but only through personal faith in Jesus Christ. How do we know? We tried it—and we had the best system of rules the world has ever seen! Convinced that no human being can please God by self-improvement, we believed in Jesus as the Messiah so that we might be set right before God by trusting in the Messiah, not by trying to be good.