We are not our own: let not our reason nor our will, therefore, sway our plans and deeds. We are not our own: let us therefore not set it as our goal to seek what is expedient for us according to the flesh. We are not our own: in so far as we can, let us therefore forget ourselves and all that is ours. Conversely, we are God's: let us therefore live for him and die for him. We are God's: let his wisdom and will therefore rule all our actions. We are God's: let all the parts of our life accordingly strive toward him as our only lawful goal (Rom. 14:8; cf. 1 Cor. 6:19)....
Let this therefore be the first step, that a man depart from himself in order that he may apply the whole force of his ability in the service of the Lord. I call 'service' not only what lies in obedience to God's Word but what turns the mind of man, empty of its own carnal sense, wholly to the bidding of God's Spirit.
The work of the Spirit, then, is joined to the word of God. But a distinction is made, that we may know that the external word is of no avail by itself. unless animated by the power of the Spirit ...All power of action, then, resides in the Spirit himself.
It is a remarkable commendation of faith, that it frees us from everlasting destruction. For he intended expressly to state that, though we appear to have been born to death, undoubted deliverance is offered to us by the faith of Christ; and, therefore, that we ought not to fear death, which otherwise hangs over us. And he has employed the universal term whosoever, both TO INVITE ALL indiscriminately to partake of life, and to cut off every excuse from unbelievers. Such is also the import of the term World, which he formerly used; for though nothing will be found in the world that is worthy of the favor of God, yet he shows himself to be reconciled to the whole world, when he invites all men WITHOUT EXCEPTION to the faith of Christ, which is nothing else than an entrance into life. Let us remember, on the other hand, that while life is promised universally to all who believe in Christ, still faith is not common to all. For Christ is made known and held out to the view of all, but the elect alone are they whose eyes God opens, that they may seek him by faith. Here, too, is displayed a wonderful effect of faith; for by it we receive Christ such as he is given to us by the Father -- that is, as having freed us from the condemnation of eternal death, and made us heirs of eternal life, because, by the sacrifice of his death, he has atoned for our sins, that nothing may prevent God from acknowledging us as his sons. Since, therefore, faith embraces Christ, with the efficacy of his death and the fruit of his resurrection, we need not wonder if by it we obtain likewise the life of Christ.
Commentary on John 3:16 (emphasis added)