Matthew Poole and continuators on Exodus 28:29

29 And Aaron shall bear the names of the children of Israel, in the breast-plate of judgment, upon his heart , when he goeth in unto the holy place , for a memorial before the LORD continually.

Partly to admonish the High-priest of that dear affection he should have to his people, and with what ardency he should pray for them, and principally to represent the tender compassions of Christ, the great high-priest, towards his people, and how mindful he is of them and of all their concerns, even when he is in the holy of holies, that is, in heaven, where he remembers them still and uncessantly intercedes for them.

(i. e.) Into the most holy place, the positive degree being put for the superlative.