Here the Apostle traverses antinomian deductions from his doctrine of liberty. In the Epistle to the Romans (ch. vi.) he deals at length with the theoretical objection to his teaching on this subject. He shows there that salvation by faith, rightly understood and experienced, renders continuance in sin impossible. For faith in Christ is in effect the union of the soul with Christ, first in His death, and then consequently in His risen life, wherein He lives only "to God." Nay, Christ Himself lives in the believing man (Gal. ii. 20). Instead of our sinning "because we are not under the law, but under grace," this is precisely the reason why we need not and must not sin. Faith joins us to the risen Christ, whose life we share—so Paul argues—and we should not sin any more than He. Here, from the practical standpoint, he lays it down that faith works by love; and love casts out sin, for it unites all laws in itself. Faith links us to Christ in heaven (Romans); faith fills us with His love on earth (Galatians). So love, marked out in ver. 6 as the energy of faith, now serves as the guard of liberty. Neither legalist nor law-breaker understands the meaning of faith in Christ.
At this point Paul throws in one of his bold paradoxes. He has been contending all through the Epistle for freedom, bidding his readers scorn the legal yoke, breathing into them his own contempt for the pettiness of Judaistic ceremonial. But now he turns round suddenly and bids them be slaves: "but let love," he says, "make you bondmen to each other" (ver. 13). Instead of breaking bonds, he seeks to create stronger bonds, stronger because dearer. Paul preaches no gospel of individualism, of egotistic salvation-seeking. The self-sacrifice of Christ becomes in turn a principle of sacrifice in those who receive it. Paul's own ideal is, to be "conformed to His death" (Phil. iii. 10). There is nothing anarchic or self-asserting in his plea for freedom. He opposes the law of Pharisaic externalism in the interests of the law of Christian love. The yoke of Judaism must be broken, its bonds cast aside, in order to give free play to "the law of the Spirit of life in Christ Jesus." Faith transfers authority from flesh to spirit, giving it a surer seat, a more effective, and in reality more lawful command over man's nature. It restores the normal equipoise of the soul. Now the Divine law is written on "the tablets of the heart"; and this makes it far more sovereign than when engraved on the stone slabs of Sinai. Love and law for the believer in Christ are fused into one. In this union law loses nothing of its holy severity; and love nothing of its tenderness. United they constitute the Christian sense of duty, whose sternest exactions are enforced by gratitude and devotion.
And love is ever conqueror. To it toil and endurance that mock the achievement of other powers, are a light thing. Needing neither bribe nor threat, love labours, waits, braves a thousand dangers, keeps the hands busy, the eye keen and watchful, the feet running to and fro untired through the longest day. There is no industry, no ingenuity like that of love. Love makes the mother the slave of the babe at her breast, and wins from the friend for his friend service that no compulsion could exact, rendered in pure gladness and free-will. Its power alone calls forth what is best and strongest in us all. Love is mightier than death. In Jesus Christ, love has "laid down life for its friends"; the fulness of life has encountered and overcome the uttermost of death. Love esteems it bondage to be prevented, liberty only to be allowed to serve.
Without love, freedom is an empty boon. It brings no ease, no joy of heart. It is objectless and listless. Bereft of faith and love, though possessing the most perfect independence, the soul drifts along like a ship rudderless and masterless, with neither haven nor horizon. Wordsworth, in his Ode to Duty, has finely expressed the weariness that comes of such liberty, unguided by an inward law and a Divine ideal:
"Me this unchartered freedom tires;
I feel the weight of chance desires:
My hopes no more must change their name;
I long for a repose that ever is the same."