For, brethren, ye have been called unto liberty; only use not liberty for an occasion to the flesh, but by love serve one another. Ye have been called unto liberty - A total freedom from all the burthensome rites and ceremonies of the Mosaic law. Only use not that liberty for an occasion to the flesh. By flesh, here, we may understand all the unrenewed desires and propensities of the mind; whatsoever is not under the influence and guidance of the Holy Spirit of God. Your liberty is from that which would oppress the spirit; not from that which would lay restraints on the flesh. The Gospel proclaims liberty from the ceremonial law: but binds you still faster under the moral law. To be freed from the ceremonial law is the Gospel liberty; to pretend freedom from the moral law is Antinomianism.
By love serve one another - Having that faith which worketh by love, serve each other to the uttermost of your power: δουλευετε, serve each other, when necessary, as slaves serve their masters. Several excellent MSS. and versions, instead of δια της αγαπης, by love, have τῃ αγαπῃ του Πνευματος, in the love of the Spirit serve one another.