How do we know that the doctrine of imputed righteousness is true?

The doctrine of imputed righteousness is firmly rooted in Scripture, emphasizing that believers are accepted by God due to their union with Christ. 2 Corinthians 5:21 states that 'He hath made Him to be sin for us, who knew no sin; that we might be made the righteousness of God in Him.' This pivotal scripture highlights the exchange that occurs—Christ taking upon Himself our sins while we receive His righteousness, underscoring the grace of God in salvation.

Furthermore, believers are not justified based on personal merit but entirely on Christ’s redemptive work. Romans 4:5 also supports this idea by explaining that 'to him that worketh not, but believeth on him that justifieth the ungodly, his faith is counted for righteousness.' This reinforces the Reformed understanding that righteousness is credited to believers through faith alone, illustrating the unmerited favor bestowed upon them, which aligns perfectly with the sovereign grace theology that we uphold.