Copies and shadows: "equally related to celestial realities"
In another passage (8:5) this is said in so many words. Here we read that the Old Testament priests serve that which is a copy and a shadow of the heavenly things. The term “copy” explains the term “shadow” and both are equally related to a celestial reality. But perhaps even more strikingly the author’s way of thinking in this respect reveals itself in the peculiar use he makes of the ideas of type and antitype. He follows in this matter a terminology which is apt to be confusing to the ordinary reader, because it apparently is the opposite of that usually combined with these words.
We say, as a rule, that the Old Covenant has the type, the New Covenant the antitype...(but) the author of Hebrews distinctly tells us (9:24) that the Old Testament tabernacle was the antitype, not the type. The explanation is very simple. It lies in this, that antitype means copy, that which is fashioned after the type, and the Old Testament tabernacle was copied, fashioned after the tabernacle in heaven. Likewise the author also finds it significant that Moses was shown a type, a model of the sanctuary on the Mount (8:5, cf. Ex. 25:40). And all the Old Testament things in general are in this sense called copies of the things in the heavens (9:23). -- Geerhardus Vos, "Hebrews, Epistle of the Diatheke", The Shorter Writings, pp. 200, 201