The Torah is not of Faith

Paul says, "The Torah is not faith." This seems to imply that, if you want to be a person of faith, the one thing you chould not do is observe the Torah. Does this make sense? In Galatians 3:11-12, Paul quotes Leviticus 18:5 and Habakkuk 2:4 in a manner consistent with rabbinic interpretation to establish that it is not the hearers of the Torah who will be declared righteous but the doers of the Torah.