If he were limited to earth, he wouldn't even be a priest. We wouldn't need him since there are plenty of priests who offer the gifts designated in the law.
These priests provide only a hint of what goes on in the true sanctuary of heaven, which Moses caught a glimpse of as he was about to set up the tent-shrine. It was then that God said, "Be careful to do it exactly as you saw it on the Mountain."
But we know the first was found wanting, because God said, Heads up! The days are coming when I'll set up a new plan for dealing with Israel and Judah.
I'll throw out the old plan I set up with their ancestors when I led them by the hand out of Egypt. They didn't keep their part of the bargain, so I looked away and let it go.
This new plan I'm making with Israel isn't going to be written on paper, isn't going to be chiseled in stone; This time I'm writing out the plan in them, carving it on the lining of their hearts. I'll be their God, they'll be my people.
They won't go to school to learn about me, or buy a book called God in Five Easy Lessons. They'll all get to know me firsthand, the little and the big, the small and the great.