For hundreds of years, windmills around the world have been used to pump water and to process grains. But in the last few decades, as wind turbines producing electricity have become more prevalent, a “fly in the ointment” unexpectedly occurred.

Researchers discovered that windpower generators worked fine at slow speeds, but at high-wind velocity, bugs on the blades reduced power output. Operators found that it was necessary to regularly wash off the buildup of dead insects to avoid having them slowly decrease the turbine’s power.

A buildup of sin in a Christian’s life can be a problem as well. God has provided a way to clear the accumulation of sins from our lives. First John 1:9 reminds us: “If we confess our sins, He is faithful and just to forgive us our sins and to cleanse us from all unrighteousness.” But unless we do that often, we’ll be running on diminished power. That’s because the power for living comes from God and not us (2 Cor. 4:7). When we try to live the Christian life in our own strength, we’ll feel defeated—like windmills robbed of their energy.

God’s power can be more easily seen and experienced in our lives when we get rid of sin’s buildup every day.