…when desire has conceived, it gives birth to sin; and sin, when it is full-grown, brings forth death. – James 1:15

For God to forgive us without renewing us, would be a frightful peril to ourselves. A man, finding himself so easily forgiven, and having no change of heart, would plunge into sin worse than ever; and, so far as my observation is concerned, I have come to the conclusion that the very worst form of character is produced in a man who, for some reason or other, thinks himself to be a favourite of heaven, and yet continues to indulge in sin. I recollect the thrill of horror, which passed through me, in my youthful days, when I heard a man, who was accustomed to be drunk, boast that he could say what none of his companions could say, namely, that he was one of the elect of God. I felt, child as I was, that he was one of the devil’s chosen followers, and I do not doubt that he really was. If a man once gets into his head such a perverted notion of the free grace of God as to imagine that it is compatible with the love of sin, and a life of sin, he is on the high road to being made into the worst conceivable character; and if such a man as that could be delivered from all the consequences of his sin, from all such consequences as might be looked upon as arbitrarily fixed by the punishing hand of God, (I know that I am talking of an impossibility,) even then he must be miserable. Such a man must go on from bad to worse; and sin, whatever we may think of it, is misery. The worm that never dies is sin; the fire that is never quenched is sin; and hell is sin fully developed. “Sin, when it is finished, bringeth forth death,” and that second death is hell. O sirs, if you could get rid of the disease, the pain, the headaches, the qualms of conscience which follow upon indulgence in sin, it would be a mischievous riddance for you, for the very pain that is caused by sin is part of God’s way of calling to you to come back to Him. As long as you are in this world, the consequences that follow after certain forms of sin are really, with all their bitterness, and they are bitter, but a healthful tonic that should make you give up sin, and turn to God.~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2797.cfm