Matthew Henry Commentary Romans 12:1-2

"I beseech you therefore, brethren, by the mercies of God, to present your bodies a living sacrifice, holy, acceptable to God, [which is] your spiritual service. And be not fashioned according to this world: but be ye transformed by the renewing of your mind, and ye may prove what is the good and acceptable and perfect will of God." — Romans 12:1-2 (ASV)

The apostle, having closed the part of his letter in which he argues for and proves various doctrines that are then practically applied, now urges important duties based on gospel principles. He urged the Romans, as his fellow believers in Christ, by the mercies of God, to present their bodies as a living sacrifice to Him. This is a powerful appeal. We receive from the Lord every day the fruits of His mercy.

Let us give ourselves—all we are, all we have, all we can do. And after all, what kind of return is this for such abundant gifts? It is acceptable to God: a reasonable service, for which we are able and ready to give a reason, and which we understand. Conversion and sanctification are the renewing of the mind; a change, not of the soul's substance, but of its qualities.

The progress of sanctification—dying to sin more and more, and living to righteousness more and more—is the continuation of this renewing work, until it is perfected in glory. The great enemy of this renewal is conformity to this world. Take heed of forming plans for happiness as though it were found in the things of this world, which soon pass away. Do not adopt the customs of those who walk in the lusts of the flesh and mind earthly things.

The work of the Holy Spirit first begins in the understanding and is carried on to the will, affections, and way of life, until there is a change in the whole person into the likeness of God, in knowledge, righteousness, and true holiness. Thus, to be godly is to surrender ourselves to God.