Augustine of Hippo

From this point Paul begins to discuss those works of the law which … no one denies also pertain to the new covenant, but with another aim, appropriate to those who perform good works "in freedom." These acts aim for the rewards of a love that hopes for eternal things and looks forward in faith. This is quite unlike the Jews, who were forced to fulfill these commandments from fear, and not that righteous fear which endures to eternity but one that made them fear for the present life. The result: they fulfill certain works of the law which consist in ceremonies but are completely unable to fulfill those that consist in good conduct. For nothing fulfills these except love.… And so the apostle now says, "You are called into freedom, brethren, but on condition that you do not let your freedom be an opportunity for the sin nature. Do not suppose, upon hearing the word freedom, that you can sin with impunity."