3d, Jesus saves his people, not only from the dominion, but from the defilement or pollution of sin. As sin is infinitely opposite to the spotless holiness of God's nature, it cannot but be very impure and loathsome in his sight. Hence we read, that he is of "purer eyes than to behold evil, and that he cannot look upon iniquity." As sin is in its own nature filthy, sinners in whose heart it reigns, are represented in Scripture as altogether filthy; and therefore as such, they are utterly unqualified to enjoy communion and intercourse with an infinitely holy God. Now, in order to render his people fit to enjoy fellowship with God, since without this it is impossible that they can be either holy or happy, Christ, as the glorious dispenser of grace in the new covenant, sends his Spirit, in the day of effectual calling, as a Spirit of holiness, to cleanse them from all filthiness of the flesh and spirit, according to that promise, "Then will I sprinkle clean water upon you, and ye shall be clean; from all your filthiness and from all your idols will I cleanse you." He begins thus to purify his people at their regeneration; for we read that they are "saved by the washing of regeneration, and renewing of the Holy Ghost." He continues to purify them from remaining depravity, by affording them fresh supplies of the sanctifying Spirit, and by enabling them to improve his death and resurrection for that purpose; until at last he presents them to his Father without spot, or wrinkle, or any such thing. The fountain that is opened to the house of David, and to the inhabitants of Jerusalem, for sin and for uncleanness, is kept continually open to them, in the offers of the Gospel; and the streams of it are appointed to follow them while they travel through this valley of tears, that they may always have an opportunity of washing away their spiritual pollution, until they come to the end of their journey.
- John Colquhoun. Sermon XIV, Salvation from Sin.( emphasis added)