And since every high priest is required to offer gifts and sacrifices, our High Priest must make an offering, too.
If he were here on earth, he would not even be a priest, since there already are priests who offer the gifts required by the law.
They serve in a system of worship that is only a copy, a shadow of the real one in heaven. For when Moses was getting ready to build the Tabernacle, God gave him this warning: “Be sure that you make everything according to the pattern I have shown you here on the mountain.”
References for Hebrews 8:5