If Satan seeks to divert the mind from this to low and sensual things, bring it back again, and place it on eternal things; and when the Lord sees the determined effort made to retain only pure thoughts, he will attract the mind, like the magnet, and purify the thoughts, and enable them to cleanse themselves from every secret sin. “Casting down imaginations, and every high thing that exalteth itself against the knowledge of God, and bringing into captivity every thought to the obedience of Christ.” The first work for those who would reform, is to purify the imagination. If the mind is led out in a vicious direction, it must be restrained to dwell only upon pure and elevated subjects. When tempted to yield to a corrupt imagination, then flee to the throne of grace and pray for strength from Heaven. In the strength of God the imagination can be restricted to dwell upon things which are pure and heavenly.