While we’re on the topic of killing sin in the life of the believer (see last post), I thought I’d pass along a deeply encouraging passage from one of the greatest sermons ever written on the expulsion of sin from the Christian’s heart.
“The Expulsive Power of a New Affection” by Scottish Presbyterian minister, Thomas Chalmers, is one of the most significant pieces ever written on the sanctifying power of the gospel. Noting the futility of our efforts to kill sin simply by a moralistic, “try-harder” attempt to rid the heart of impurity, Chalmers offers a better way.
To summarize his message, he writes that in order to successfully put away a sinful affection, we must replace that affection with a new affection so great and glorious, it forces the sinful affection to be subordinated and obliterated. Because the heart cannot move from a sinful affection to no affection at all, it will, by its very nature, move on to another. We must choose then, by the power of the Spirit, to replace our old affections with the beauty and glory of the love of God demonstrated in the person and work of Christ.
Near the end of his sermon, Chalmers writes:
The object of the Gospel is both to pacify the sinner’s conscience, and to purify his heart; and it is of importance to observe, that what mars the one of these objects, mars the other also. The best way of casting out an impure affection is to admit a pure one; and by the love of what is good, to expel the love of what is evil. Thus it is, that the freer the Gospel, the more sanctifying is the Gospel; and the more it is received as a doctrine of grace, the more will it be felt as a doctrine according to godliness. This is one of the secrets of the Christian life, that the more a man holds of God as a pensioner, the greater is the payment of service that he renders back again. On the tenure of “Do this and live,” a spirit of fearfulness is sure to enter; and the jealousies of a legal bargain chase away all confidence from the intercourse between God and man; and the creature striving to be square and even with his Creator, is, in fact, pursuing all the while his own selfishness, instead of God’s glory; and with all the conformities which he labours to accomplish, the soul of obedience is not there, the mind is not subject to the law of God, nor indeed under such an economy ever can be. It is only when, as in the Gospel, acceptance is bestowed as a present, without money and without price, that the security which man feels in God is placed beyond the reach of disturbance—or, that he can repose in Him, as one friend reposes in another—or, that any liberal and generous understanding can be established betwixt them—the one party rejoicing over the other to do him good—the other finding that the truest gladness of his heart lies in the impulse of a gratitude, by which it is awakened to the charms of a new moral existence.
Salvation by grace—salvation by free grace—salvation not of works, but according to the mercy of God—salvation on such a footing is not more indispensable to the deliverance of our persons from the hand of justice, than it is to the deliverance of our hearts from the chill and the weight of ungodliness.Retain a single shred or fragment of legality with the Gospel, and we raise a topic of distrust between man and God. We take away from the power of the Gospel to melt and to conciliate. For this purpose, the freer it is, the better it is. That very peculiarity, which so many dread as the germ of antinomianism, is, in fact, the germ of a new spirit, and a new inclination against it. Along with the light of a free Gospel, does there enter the love of the Gospel, which, in proportion as we impair the freeness, we are sure to chase away. And never does the sinner find within himself so mighty a moral transformation, as when under the belief that he is saved by grace, he feels constrained thereby to offer his heart a devoted thing, and to deny ungodliness. To do any work in the best manner, we should make use of the fittest tools for it. (emphasis mine)
If you’re interested in reading more of Chalmers’ work, check out the Letters of Thomas Chalmers.