How do we know the doctrine of imputation is true?

The truth of imputation, which teaches that our sins are transferred to Christ and His righteousness is imputed to us, is firmly rooted in Scripture. In 2 Corinthians 5:21, Paul articulates that God made Christ, who knew no sin, to be sin for us. This exchange is foundational to the gospel, emphasizing that believers are credited with Christ's righteousness, enabling them to stand justified before God's judgment. Furthermore, this doctrine upholds the sovereignty of grace, demonstrating that salvation is entirely the work of God, not by our own efforts.