What does the Bible say about Christian struggle with sin?

In Romans 7, the Apostle Paul articulates the internal conflict faced by believers as they grapple with sin. This chapter highlights that the law is spiritual, but we, in our flesh, are carnal and sold under sin. Paul describes this struggle as a war within, where the desires of the flesh oppose the desires of the spirit. He emphasizes that this struggle is a hallmark of genuine faith, unique to those who are regenerated by the Holy Spirit, contrasting it with the struggles of unbelievers who lack spiritual insight into sin and righteousness.