How do we know priesthood for all believers is true?

Scriptural evidence from Revelation 1:5-6 and 1 Peter 2:5-9 demonstrates that every believer is a priest. Revelation declares that Jesus has made us kings and priests unto God, which indicates that there is no longer a necessity for a separate order of priests. First Peter reinforces this by referring to believers as a 'royal priesthood,' suggesting that all Christians have direct access to God without the mediation of a human priest. This democratization of access to God is foundational to the New Covenant established in Christ.