God saves us from our sinful uncleanness by the washing of regeneration and renewing of the Holy Ghost, as well as from hell hereafter (Ezek. 36:29; Titus 3:5). Christ was called JESUS, that is, a Saviour, because He saved His people from their sins (Matt. 1:21). Therefore it is a part of our salvation to deliver us from our sins, which is begun in this life by justification and sanctification, and perfected by glorification in the life to come.
Though we are not saved by good works, as procuring causes, yet we are saved to good works, as fruits and effects of saving grace, which God has prepared that we should walk in them (Eph. 2:10). It is, indeed, one part of our salvation to be delivered from the bondage of the covenant of works; but the end of this is, not that we may have liberty to sin (which is the worst of slavery) but that we may fulfill the royal law of liberty, and that we may serve in newness of spirit and not in the oldness of the letter (Gal. 5:13; Rom. 7: 6). Yea, holiness in this life is such a part of our salvation as is a necessary means to make us suitable to be partakers of the inheritance of the saints in heavenly light and glory; without holiness we can never see God (Heb. 12:14), and are as unfit for the glorious presence as swine for the presence chamber of an earthly prince. I confess, some may be converted when they are so near the point of death that they may have little time to practice holiness in this world, but the grace of the Spirit is active like fire (Matt. 3:11), and, as soon as it is given, it will immediately produce good inward working of love to God and Christ and His people. This will be sufficient to manifest the righteous judgement of God in saving them at the great day, when He shall
judge every man according to His work; though some possibly may not have so much time to discover their inward grace in any outward works, as the thief upon the cross (Luke 23: 40,43). . .
Great multitudes of ignorant people that live under the gospel harden their hearts in sin, and ruin their souls for ever, by trusting on Christ for such an imaginary salvation as does not consist at all in holiness, but only in forgiveness of sin and deliverance from everlasting torments. They would be free from the punishment due to sin, but they love their lusts so well that they hate holiness, and would not be saved from the service of sin. The way to oppose this pernicious delusion is not to deny, as some do, that trusting on Christ for salvation is a saving act of faith, but rather to show that none do or can trust on Christ for true salvation, except they trust on Him for holiness; neither do they heartily desire true salvation, if they do not desire to be made holy and righteous in their hearts and lives. If ever God and Christ give you salvation, holiness will be one part of it; if Christ does not wash you from the filth of your sins, you have no part with Him (John 13:8). What a strange kind of salvation do they desire, that do not care for holiness? They would be saved, and yet be altogether dead in sin, aliens from the life of God, bereft of the image of God, deformed by the image of Satan, his slaves and vassals to their own filthy lusts, utterly unsuitable for the enjoyment of God in glory. Such a salvation as that was never purchased by the blood of Christ, and those that seek it abuse the grace of God in Christ and turn it into lasciviousness.
excerpt from: Marshall, Walter The Gospel Mystery of Sanctification. Grand Rapids, Mich.: Reformation Heritage Books, 1999.