The Apostle Paul
Galatians 5:4BSB·traditional attribution

You who are trying to be justified by the law have been severed from Christ; you have fallen away from grace.

John Calvin Reformed @genevareformer

4. Christ has become of no effect unto you. “If ye seek any part of righteousness in the works of the law, Christ has no concern with you, and ye are fallen from grace.” They were not so grossly mistaken as to believe that by the observance of the law alone they were justified, but attempted to mix Christ with the law.

Matthew Henry Presbyterian @wholebiblehenry

In the former part of this chapter the apostle cautions the Galatians to take heed of the judaizing teachers, who endeavoured to bring them back under the bondage of the law. He had been arguing against them before, and had largely shown how contrary the principles and spirit of those teachers were to the spirit of the gospel; and now this is as it were...

Commenting on Galatians 5:1-12

John Gill Reformed Baptist @doctorgill

Christ is become of no effect unto you,.... Or "ye are abolished from Christ"; or as others by an "hypallage" read the words, "Christ is abolished unto you"; for by their seeking for justification by their own works, it was all one to them as if there was no Christ, and no righteousness in him, and no salvation by him; they had nothing to do...