11. Lest I have bestowed upon you labor in vain. The expression is harsh, and must have filled the Galatians with alarm; for what hope was left to them, if Paul’s labor had been in vain? Some have expressed astonishment that Paul should be so powerfully affected by the observance of days, as almost to designate it a subversion of the whole gospel. But if we carefully weigh the whole, we shall see that there was just reason; and that the false apostles not only attempted to lay the yoke of Jewish bondage on the neck of the church, but filled their minds with wicked superstitions. To bring back Christianity to Judaism, was in itself no light evil; but far more serious mischief was done, when, in opposition to the grace of Christ, they set up holidays as meritorious performances, and pretended that this mode of worship would propitiate the divine favor. When such doctrines were received, the worship of God was corrupted, the grace of Christ made void, and the freedom of conscience oppressed.
Do we wonder that Paul should be afraid that he had labored in vain, that the gospel would henceforth be of no service? And since that very description of impiety is now supported by Popery, what sort of Christ or what sort of gospel does it retain? So far as respects the binding of consciences, they enforce the observance of days with not less severity than was done by Moses. They consider holidays, not less than the false apostles did, to be a part of the worship of God, and even connect with them the diabolical notion of merit. The Papists must therefore be held equally censurable with the false apostles; and with this addition in aggravation, that, while the former proposed to keep those days which had been appointed by the law of God, the latter enjoin days, rashly stamped with their own seal, to be observed as most holy.