John Chrysostom
"But Christ, having come as High Priest of the good things to come, through the greater and more perfect tabernacle, not made with hands." Here he means Christ's flesh.
He rightly called it greater and more perfect, because God the Word and the whole power of the Spirit dwell in it. "For God does not give the Spirit by measure" (Jn 3:34).
He calls it "more perfect" because it is blameless and has accomplished greater works.
"That is, not of this creation," or "not of this construction." This is why it is greater. It would not be of the Spirit if man had fashioned it.
"Not of this creation" means not of such a construction as created things have, but of a spiritual one. It was fashioned by the Holy Spirit.
Do you see how he calls Christ's body both tabernacle, and veil, and heaven?
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He says, "through the greater and more perfect tabernacle." Then later he says, "which He opened for us through the veil, that is, His flesh" (Heb 10:20).
Again: "He enters the inner place behind the veil" (Heb 6:19). And again: "Christ entered not into a sanctuary made with hands, a copy of the true, but into heaven itself, now to appear in the presence of God for us" (Heb 9:24).
Why does he do this? To teach us that in both types there is one and the same meaning.
Specifically, heaven is a veil, because the veil separates the holy place. So also the flesh conceals the Godhead.
Likewise the flesh, enclosing the Godhead, is a tabernacle. Heaven also is a tabernacle, because the Priest dwells there within.
"Christ entered," he says, "as High Priest." He did not say, "having become," but "entered," that is, having come for this very work.
He did not succeed someone else, nor was it that He first came and afterward became High Priest. He was this at the very moment He came.