How do we know the doctrine of Christ's mediatorial life is true?

The doctrine of Christ's mediatorial life is grounded in biblical revelation that details His functions as our high priest. Hebrews 7:15-16 highlights that Jesus' priesthood is based on the 'power of an indestructible life.' This mediatorial life is essential for our salvation, as it is through this role that He intercedes for us. Furthermore, Revelation 1:18 describes Jesus as living forevermore, maintaining His mediatorial presence. As He fulfills His roles within the Triune Godhead, believers can be assured of His continual advocacy and representation before God.