One of the issues that I have been working on-thinking about, reading about, talking about, praying about, preaching about hearing about-is how the gospel functions in our life. The gospel is hard-core objective truth; it is news about what has already happened-really happened, in time, eternally true. "How does this foundation work itself out in our daily lives?" is the question I have been grappling with.
Walter Marshall suggests that the gospel truths are necessary precursors to gospel practices. He believes that the comfort from the benefits and the promises that result from the grace of God works as arguments and motivations to stir us up to gospel-living.
Here is the excerpt I found so helpful:
The usual method of gospel doctrine, as it is delivered to us in the Holy Scriptures, is first, to comfort our hearts, and in this way to establish us in every good word and work (2 Thess. 2:17). And it appears how clearly this method is adjusted in several Epistles written by the apostles, in which they first acquaint the churches with the rich grace of God towards them in Christ, and the spiritual blessings which they are made partakers of for their strong consolation, and they exhort them to a holy conversation, answerable to such privileges. And it is not only the method of whole Epistles, but of many particular exhortations to duty, in which the comfortable benefits of the grace of God in Christ are made use of as arguments and motives to stir up the saints to a holy practice; which comfortable benefits must first be believed, and the comfort of them applied to our own souls, or else they will not be forcible to engage us to the practice for which they are intended.
To give you a few instances, out of a multitude that might be alleged, we are exhorted to practice holy duties because we are dead to sin and alive to God through Jesus Christ our Lord (Rom. 6:11); and because sin shall not have dominion over us, for we are not under the law, but under grace (Rom. 6:14); because we are not in the flesh, but in the Spirit, and God will quicken our mortal bodies by His Spirit dwelling in us (Rom. 8:9, 11); because our bodies are the members of Christ and the temples of the Holy Ghost (1 Cor. 6:15, 19); because God has made Him to be sin for us, who knew no sin, that we might be made the righteousness of God in Him (2 Cor. 5:21); and has promised that He will dwell in us, and walk in us, and be to us a Father, and we shall be to Him sons and daughters (2 Cor. 6:18; 7:1); because God has forgiven us for Christ's sake, and accounts us His dear children; and Christ has loved us, and given Himself for us; and we, that were sometimes darkness, are now light in the Lord (Eph. 4:32; 5:1, 2, 8); because we are risen with Christ and, when Christ, who is our life, shall appear, then shall we also appear with Him in glory (Col. 3:1, 4); because God has said, 'I will never leave you,. nor forsake you' (Heb. 13:5); because of the many promises made to us (2 Cor. 7:1). Search the Scriptures, and you may with delight see that this is the vein that runs through gospel exhortations, and you may find the like vein of comfort running through the prophetical exhortations in the Old Testament.