John Chrysostom

"For Christ is not entered into the Holy Places made with hands" (he says) "which are the figures of the True." (These then are true; and those are figures, for the temple too has been so arranged, as the Heaven of Heavens.) What sayest thou? He who is everywhere present, and who filleth all things, doth not He "appear" unless He enter into Heaven? Thou seest that all these things pertain to the flesh. "To appear," he says, "in the presence of God for us." What is "for us"? …

Homily on Hebrews 17 ↗

Theophylact of Ohrid

The Jews greatly prided themselves on their temple, for nowhere on earth was there such a temple either in beauty or in magnificence. Since the Jews were captivated by material things, God commanded that it be constructed in the most magnificent manner. Therefore people came to it even from the ends of the earth (Acts 2:5–10). What then does Paul do? Just as he dealt with the sacrifices and overthrew them by setting against them the death of Christ, so here too, by setting heaven against the temple, he shows the difference. …

Commentary on Hebrews ↗

Oecumenius

"but he entered into heaven itself." The phrase, "he entered into heaven," should be understood from a common perspective, as if to say, Nor does he frequently offer himself, for he has entered into heaven. For indeed, frequently to offer sacrifices through blood belongs to those who enter into the copies of the true one, but not to him who has entered into heaven itself.

The Pseudo-Oecumenian Catena on Hebrews ↗

Thomas Aquinas

465. – Then (v. 24) he shows that heavenly things are cleansed by better sacrifices. For the high priest expiated the sanctuary which was made with hands, but Christ has entered into the Holies not made with hands, for they were not, so far as they were concerned, the patterns of the true one, but into heaven itself, which He expiated not in itself but in regard to us, as has been said. …

Commentary on Hebrews ↗