Now of the things which we have spoken this is the sum: We have such an high priest, who is set on the right hand of the throne of the Majesty in the heavens; A minister of the sanctuary, and of the true tabernacle, which the Lord pitched, and not man. Hebrews 8:1, 2
Thus those who were studying the subject found indisputable proof of the existence of a sanctuary in heaven. Moses made the earthly sanctuary after a pattern which was shown him. Paul teaches that that pattern was the true sanctuary which is in heaven. And John testifies that he saw it in heaven.
In the temple in heaven, the dwelling place of God, His throne is established in righteousness and judgment. In the most holy place is His law, the great rule of right by which all mankind are tested. The ark that enshrines the tables of the law is covered with the mercy seat, before which Christ pleads His blood in the sinner's behalf. Thus is represented the union of justice and mercy in the plan of human redemption. This union infinite wisdom alone could devise and infinite power accomplish; it is a union that fills all heaven with wonder and adoration. The cherubim of the earthly sanctuary, looking reverently down upon the mercy seat, represent the interest with which the heavenly host contemplate the work of redemption. This is the mystery of mercy into which angels desire to look--that God can be just while He justifies the repenting sinner and renews His intercourse with the fallen race." (The Great Controversy, 415)
Reflection: The work in the earthly sanctuary was vitally important to mankind. God's work in behalf of you and me and all humanity is taking place by Christ Himself in the sanctuary in heaven. The work is almost done. Are you ready?