The success of our struggle with sin begins with our believing deep down in our hearts that regardless of our failures and our struggle, we have died to sin’s guilt. We must believe that however often we fail, there is no condemnation for us (Rom. 8:1).
William Romaine, who was one of the leaders of the eighteenth-century revival in England, wrote, “No sin can be crucified either in heart or life unless it first be pardoned in conscience…. If it be not mortified in its guilt, it cannot be subdued in its power.” What Romaine was saying is that if you do not believe you have died to sin’s guilt, you cannot trust Christ for the strength to subdue its power in your life. So the place to begin in dealing with sin is to believe the gospel when it says you have died to sin’s guilt.
Warring against our sinful habits and seeking to put on Christlike character is usually called sanctification. But because the term definitive sanctification is used to describe the point-in-time deliverance from the dominion of sin, it is helpful to speak of Christian growth in holiness as progressive sanctification. Additionally, the word progressive indicates continual growth in holiness over time. The New Testament writers both assume growth (see 1 Cor. 6:9-11; Eph. 2:19-21; Col. 2:19; 2 Thess. 1:3); and continually urge us to pursue it (see 2 Cor. 7:1; Heb. 12:14; 2 Pet. 3:18). There is no place in authentic Christianity for stagnant, self-satisfied, and self-righteous Christians. Rather we should be seeking to grow in Christlikeness until we die.
This progressive sanctification always involves our practice of spiritual disciplines, such as reading Scripture, praying, and regularly fellowshipping with other believers. It also involves putting to death the sinful deeds of the body (see Rom. 8:13) and putting on Christlike character (see Col. 3:12-14). And very importantly it involves a desperate dependence on Christ for the power to do these things, for we cannot grow by our own strength.
So sanctification involves hard work and dependence on Christ; what I call dependent effort. And it will always mean we are dissatisfied with our performance. For a growing Christian, desire will always outstrip performance or, at least, perceived performance. What is it then that will keep us going in the face of this tension between desire and performance? The answer is the gospel. It is the assurance in the gospel that we have indeed died to the guilt of sin and that there is no condemnation for us in Christ Jesus that will motivate us and keep us going even in the face of this tension.
We must always keep focused on the gospel because it is in the nature of sanctification that as we grow, we see more and more of our sinfulness. Instead of driving us to discouragement, though, this should drive us to the gospel. It is the gospel believed every day that is the only enduring motivation to pursue progressive sanctification even in those times when we don’t seem to see progress.