III, 19.3. On this [Christian liberty] almost the whole subject of the Epistle to the Galatians hinges; for it can be proved from express passages that those are absurd interpreters who teach that Paul there contends only for freedom from ceremonies. Of such passages are the following: “Christ has redeemed us from the curse of the law, being made a curse for us.” “Stand fast, therefore, in the liberty wherewith Christ has made us free, and be not entangled again with the yoke of bondage. Behold, I Paul say unto you, that if ye be circumcised, Christ shall profit you nothing. For I testify again to every man that is circumcised, that he is a debtor to do the whole law. Christ is become of no effect unto you, whosoever of you are justified by the law; ye are fallen from grace,” (Gal. 3:13; 5:1–4). These words certainly refer to something of a higher order than freedom from ceremonies. I confess, indeed, that Paul there treats of ceremonies, because he was contending with false apostles, who were plotting, to bring back into the Christian Church those ancient shadows of the law which were abolished by the advent of Christ. But, in discussing this question, it was necessary to introduce higher matters, on which the whole controversy turns. First, because the brightness of the Gospel was obscured by those Jewish shadows, he shows that in Christ we have a full manifestation of all those things which were typified by Mosaic ceremonies. Secondly, as those impostors instilled into the people the most pernicious opinion, that this obedience was sufficient to merit the grace of God, he insists very strongly that believers shall not imagine that they can obtain justification before God by any works, far less by those paltry observances. At the same time, he shows that by the cross of Christ they are free from the condemnation of the law, to which otherwise all men are exposed, so that in Christ alone they can rest in full security. This argument is pertinent to the present subject (Gal. 4:5, 21, &c). Lastly, he asserts the right of believers to liberty of conscience, a liberty which may not be restrained without necessity.
 Calvin, J. (1997). Institutes of the Christian religion. Bellingham, WA: Logos Bible Software.