6:21-23 The pleasure and profit of sin do not deserve to be called fruit. Sinners are but ploughing iniquity, sowing vanity, and reaping the same. Shame came into the world with sin, and is still the certain effect of it. The end of sin is death. Though the way may seem pleasant and inviting, yet it will be bitterness in the latter end. From this condemnation the believer is set at liberty, when made free from sin. If the fruit is unto holiness, if there is an active principle of true and growing grace, the end will be everlasting life; a very happy end! Though the way is up-hill, though it is narrow, thorny, and beset, yet everlasting life at the end of it is sure. The gift of God is eternal life. And this gift is through Jesus Christ our Lord. Christ purchased it, prepared it, prepares us for it, preserves us to it; he is the All in all in our salvation.
22. But now—as if to get away from such a subject were unspeakable relief.
being made free from Sin, and become servants to God—in the absolute sense intended throughout all this passage.
ye have—not "ought to have," but "do have," in point of fact.
your fruit unto holiness—"sanctification," as in Ro 6:19; meaning that permanently holy state and character which is built up out of the whole "fruits of righteousness," which believers successively bring forth. They "have their fruit" unto this, that is, all going towards this blessed result.
and the end everlasting life—as the final state of the justified believer; the beatific experience not only of complete exemption from the fall with all its effects, but of the perfect life of acceptance with God, and conformity to His likeness, of unveiled access to Him, and ineffable fellowship with Him through all duration.