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September 10, 2026

Exterminating Sin

Pastor Pete Smith· · Proverbs 28:13
Whoever conceals his transgressions will not prosper, but he who confesses and forsakes them will obtain mercy.
Proverbs 28:13

Not long ago, a friend recounted a phone conversation with his out-of-state adult daughter. To hear him tell it, she is not, well, a great housekeeper. During the call, she complained that a mouse was running past her chair. Alarmed, he told her to take care of it immediately. She was unfazed, calmly noting that she would pick up some items from the store when she had a chance. The next time they spoke, he immediately asked if she had purchased the materials. She told him she kept forgetting and coolly added, “There aren’t that many.” He tried warning her that it could quickly turn into a major infestation, yet there was no urgency. It was never spoken of again.

I imagine you are as wide-eyed reading that account as I was when I first heard it! It’s hard to comprehend such indifference to something so unpleasant. Under the right conditions, a small group of mice can rapidly multiply into dozens or even hundreds. Of course, a single mouse can show up just about anywhere at some point, but it’s an easy problem to solve if you address it immediately. A delayed response, however, can be costly.

The same goes for sin. Paul acknowledges the ongoing presence of sin in the Christian’s life, writing, “For I know that nothing good dwells in me, that is, in my flesh. For I have the desire to do what is right, but not the ability to carry it out” (Rom. 7:18). The corruption of the sinful nature persists in this life, even among believers. The only acceptable response, then, is to determine how quickly you can exterminate it before it multiplies. That’s what Paul meant in his first letter to the Corinthian church.

Your boasting is not good. Do you not know that a little leaven leavens the whole lump? Cleanse out the old leaven that you may be a new lump, as you really are unleavened. For Christ, our Passover lamb, has been sacrificed. Let us therefore celebrate the festival, not with the old leaven, the leaven of malice and evil, but with the unleavened bread of sincerity and truth.
1 Corinthians 5:6-8

Like “a little leaven,” these sins can become a manifestation. He warns against the idea that you can exhibit sincerity and truth while clinging to a bit of malice and evil. This is also why Jesus said, “Truly, truly, I say to you, everyone who practices sin is a slave to sin” (Jn. 8:34). To practice it is to submit completely to it. What starts as dabbling ends in subjection.

The good news is that, like a black light for mice, there is a surefire way to find hidden sins, accompanied by a guaranteed way to kill them. It is the combination of the law and the gospel.

Now the law came in to increase the trespass, but where sin increased, grace abounded all the more, so that, as sin reigned in death, grace also might reign through righteousness leading to eternal life through Jesus Christ our Lord.
Romans 5:20-21

The law reveals the presence of sin, and the gospel wipes it out! Do you submit yourself to the searching light of the law and run to the cross to be cleaned, or are you comfortable letting sin scamper around your life? How motivated are you to address your known sin? Do you seek Christ without delay to have it exterminated, or do you risk manifestation by taking the “when I have a chance” approach? Be sure that unaddressed sin will not stay hidden or inactive. To believe it will go away on its own is self-deception.

If we say we have no sin, we deceive ourselves, and the truth is not in us. If we confess our sins, He is faithful and just to forgive us our sins and to cleanse us from all unrighteousness. If we say we have not sinned, we make Him a liar, and His word is not in us.
1 John 1:8-10

Don’t ignore sin droppings, and don’t turn a deaf ear to the clicking of their nails on the floor next to you. Exterminate them!