Sin has been present in the world since the time of Adam, long before the law was given through Moses. This verse points out that while sin existed, it wasn't accounted for in the same way because there was no formal law to define and highlight it. The law serves as a mirror, reflecting human shortcomings and the need for divine grace. Without the law, people might not fully recognize their sinful nature or their need for redemption. However, even when sin wasn't counted against people in the same way, it still had real consequences, leading to separation from God.
This passage underscores the importance of the law in making people aware of their sins, but it also points to the greater truth of God's grace. The law reveals sin, but it is through Jesus Christ that believers find forgiveness and reconciliation with God. This understanding helps Christians appreciate the balance between law and grace, recognizing that while the law reveals sin, it is through faith in Christ that one is justified and made right with God.