So deeply planted are the roots of human corruption, that even after we are born again, renewed, “washed, sanctified, justified,” and made living members of Christ, these roots remain alive in the bottom of our hearts, and, like the leprosy in the walls of the house, we never get rid of them until the earthly house of this tabernacle is dissolved. Sin, no doubt, in the believer’s heart, has no longer dominion. It is checked, controlled, mortified, and crucified by the expulsive power of the new principle of grace. The life of a believer is a life of victory, and not of failure. But the very struggles which go on within his bosom, the fight that he finds it needful to fight daily, the watchful jealousy which he is obliged to exercise over his inner man, the contest between the flesh and the spirit, the inward “groanings” which no one knows but he who has experienced them - all, all testify to the same great truth, all show the enormous power and vitality of sin. Mighty indeed must that foe be who even when crucified is still alive!