Now, it is to be noticed that the metaphor of sacrifice runs through the whole of the phraseology of my text. The word rendered 'present' is a technical expression for the sacerdotal action of offering. A tacit contrast is drawn between the sacrificial ritual, which was familiar to Romans as well as Jews, and the true Christian sacrifice and service. In the former a large portion of the sacrifices consisted of animals which were slain. Ours is to be 'a living sacrifice.' In the former the offering was presented to the Deity, and became His property. In the Christian service, the gift passes, in like manner, from the possession of the worshipper, and is set apart for the uses of God, for that is the proper meaning of the word 'holy.' The outward sacrifice gave an odour of a sweet smell, which, by a strong metaphor, was declared to be fragrant in the nostrils of Deity. In like manner, the Christian sacrifice is 'acceptable unto God.' These other sacrifices were purely outward, and derived no efficacy from the disposition of the worshipper. Our sacrifice, though the material of the offering be corporeal, is the act of the inner man, and so is called 'rational' rather than 'reasonable,' as our Version has it, or as in other parts of Scripture, 'spiritual.' And the last word of my text, 'service,' retains the sacerdotal allusion, because it does not mean the service of a slave or domestic, but that of a priest. And so the sum of the whole is that the master-word for the outward life of a Christian is sacrifice. That, again, includes two things--self-surrender and surrender to God. Now, Paul was not such a superficial moralist as to begin at the wrong end, and talk about the surrender of the outward life, unless as the result of the prior surrender of the inward, and that priority of the consecration of the man to his offering of the body is contained in the very metaphor. For a priest needs to be consecrated before he can offer, and we in our innermost wills, in the depths of our nature, must be surrendered and set apart to God ere any of our outward activities can be laid upon His altar. The Apostle, then, does not make the mistake of substituting external for internal surrender, but he presupposes that the latter has preceded. He puts the sequence more fully in the parallel passage in this very letter: 'Yield yourselves unto God, and your bodies as instruments of righteousness unto Him.' So, then, first of all, we must be priests by our inward consecration, and then, since 'a priest must have somewhat to offer,' we must bring the outward life and lay it upon His altar.