The sermon centers on Exodus 28–29, revealing God's provision of a holy mediator and a holy sacrifice to reconcile sinful humanity to His holy presence. Through the detailed appointment and consecration of Aaron and his sons as priests, the text illustrates that access to God is not earned by human effort or perfection, but granted by divine grace and ritual purification, symbolizing the need for a mediator who bears the people's names before God. These ceremonial elements, though no longer required in the New Testament, foreshadow Christ's perfect priesthood—His holiness, sacrificial death, and ongoing intercession—fulfilling what the Old Testament shadows pointed toward. The preacher emphasizes that while the Levitical system was a solemn, demanding path, believers today can draw near to God with confidence through Christ's finished work, not by performance, but by faith in His eternal priesthood. The call is clear: know Christ as the sole mediator, approach God with holy reverence and assured faith, and live in the reality of His continual presence and grace.