In Galatians 5:16, all believers are commanded:
Walk by the Spirit, and you will not carry out the desire of the flesh.If Christians walk by the Spirit, they will not carry out the desire of the flesh (the desire they have due to lingering sinful tendencies). Galatians 5:17 states:
For the flesh sets its desire against the Spirit, and the Spirit against the flesh; for these are in opposition to one another, so that you may not do the things that you please.The believer has a powerful weapon to combat sin with: the Spirit. But the unbeliever has no sufficient weapon. All the unbeliever has in opposition to the flesh is a gnawing conscience which prevents him from fully manifesting his wretchedness. Romans farther states that those in the flesh cannot please God (Romans 8:8).
How is it that out of the billions upon billions of people who have lived in this world, not one of them has successfully avoided sin? Clearly there is something terribly wrong in men. It has nothing to do with a man’s environment or surroundings. There is something wrong with man’s nature—it is terribly corrupt. The book of Ephesians states that believers all formerly lived in the lusts of our flesh, indulging the desires of the flesh and of the mind, and were by nature children of wrath, even as the rest (Ephesians 2:3).
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