How do we know reconciliation through Jesus is true?

Our confidence in the truth of reconciliation through Jesus Christ is based on the explicit teachings of Scripture, particularly in Ephesians 2:16 where it states that Christ reconciled both Jew and Gentile in one body to God through the cross. This act abolished hostility and restored peace. Furthermore, the declaration of 'It is finished' by Christ signifies the completion of the work necessary for our reconciliation. The fulfillment of prophetic scripture and the eyewitness accounts of His resurrection further confirm the reality of this reconciliation. Thus, we trust that through faith in Christ, we have attained peace with God.