Christians struggle with sin because they remain in the flesh, which is inherently sinful, but they also have the spirit to resist and overcome it.
The struggle with sin is a reality for all believers due to the lingering presence of the flesh, as Paul discusses in Romans 7. Although believers have been made alive in Christ, they still contend with their sinful desires present in their earthly bodies. This internal conflict highlights the ongoing battle between the old nature and the new nature in Christ. However, the assurance that believers are not defeated lies in the power of the Holy Spirit, who strengthens and enables them to resist sin's temptations. By acknowledging this struggle yet recognizing the grace they have in Christ, believers can continue to grow in holiness and seek to live according to God’s will.
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