How do we know the doctrine of the priesthood of all believers is true?

The validity of the priesthood of all believers can be substantiated through both Scripture and historical Christian thought. Key texts such as 1 Peter 2:9 serve as a declaration from Peter that all believers are indeed a priestly nation, chosen to proclaim the praises of Him who called them out of darkness. This New Testament revelation transforms the understanding of access to God, previously limited to an ordained priesthood in the Old Testament.

Throughout church history, the Reformation brought about a renewed emphasis on this doctrine, with reformers like Luther and Calvin reinforcing the idea that every believer has not only rights but also significant responsibilities toward God and one another. Additionally, this doctrine combats both clericalism, which elevates a select group of leaders, and the individualism that dismisses communal engagement in faith. It encourages a collective responsibility among believers to support and nurture one another's faith journeys based on their unique gifts and callings. Thus, the priesthood of all believers remains a cornerstone of Reformed theology, ensuring that each member's voice is valued in the life of the church.