Theophylact of Ohrid, on Heb 8:4

“If then he were on earth, he would not be a priest: seeing that there would be others to offer gifts according to the law,”

“He further confirms that although He does not have His tabernacle on earth but in heaven, there is nevertheless no obstacle to His being a priest. And notice the wisdom. On the very basis by which someone might especially argue that He is not a priest — I mean, of course, that He does not have a place on earth where He served as priest — on this very basis he most strongly affirms that He is a Priest, and says that He is a Priest precisely because He did not have a place on earth. "If He were remaining on earth, He would not even be a priest." For there were other priests on earth, and this circumstance would seem to be a refutation. But now, having heaven as His place, and having brought up there His own body, He intercedes for us before the Father. Hence, since He is in heaven, He is therefore preeminently a Priest.”

Imported from an open dataset — not yet checked against the printed edition.