How do we know our justification in Christ is true?

Our justification in Christ is rooted in the completed work of Jesus on the cross. Romans 5:8-9 states that God demonstrates His love for us in that while we were sinners, Christ died for us, and through Him, we are justified. This declaration is confirmed in Scripture, which assures believers that they are made righteous through faith. Furthermore, the internal witness of the Holy Spirit assures believers of their justification, confirming that they are no longer condemned but accepted in the beloved.