Calvin on the New Perspective on Paul

"They prate that the ceremonial works of the law are excluded, not the moral works. They become so proficient by continual wrangling that they do not even grasp the first elements of logic. Do they think that the apostle was raving when he brought forward these passages to prove his opinion? 'The man who does these things will live in them' [Gal. 3:12], and, 'Cursed be every one who does not fulfill all things written in the book of the law' [Gal. 3:10 p.]. Unless they have gone mad they will not say that life was promised to keepers of ceremonies or the curse announced only to those who transgress the ceremonies. If these passages are to be understood of the moral law, there is no doubt that moral works are also excluded from the power of justifying. These arguments which Paul uses look to the same end: 'Since through the law comes knowledge of sin' [Rom. 3:20], therefore not righteousness. Because 'the law works wrath' [Rom. 4:15], hence not righteousness. Because the law does not make conscience certain, it cannot confer righteousness either. Because faith is imputed as righteousness, righteousness is therefore not the reward of works but is given unearned [Rom. 4:4-5]. Because we are justified by faith, our boasting is cut off [Rom. 3:27 p.]. 'If a law had been given that could make alive, then righteousness would indeed be by the law. But God consigned all things to sin that the promise might be given to those who believe.' [Gal. 3:21-22 p.] Let them now babble, if they dare, that these statements apply to ceremonies, not to morals. Even schoolboys would hoot at such impudence. Therefore, let us hold as certain that when the ability to justify is denied to the law, these words refer to the whole law."

(Institutes 3.11.19)