ISB ~ 2 Corinthians 5 v20

ambassadors:The term refers to envoys who represented Roman emperors in distant territories. These representatives carried the authority of the reigning ruler with them wherever they went. Similarly, Christians in general and the apostles in particular bear, each in their own way, the royal, priestly, and prophetic authority of Christ to the world (Mt 18:18; Rom 15:16; Rev 5:9-10) (CCC 859).