Believers struggle with sin due to the presence of the flesh, which serves the law of sin, even as they seek to walk in the Spirit.
The existence of a struggle with sin among believers is evidenced in Romans 7, where Paul articulates the tension between the sin dwelling within him and the good he desires to do. This struggle indicates that while believers are regenerated and indwelled by the Holy Spirit, they still possess a sinful nature that influences their thoughts and actions. Despite the ongoing presence of sin, grace allows believers to resist its dominion and strive to live in accordance with the Spirit's leading, demonstrating that victory over sin is achieved through Christ.
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