John Chrysostom
Intending to describe His advantages in comparison with Moses, the Apostle speaks about the law concerning the priesthood, because everyone held a high opinion of Moses.
Here he already indicates the seeds of this superiority. Yet he begins with the flesh and then passes to the Divinity, in regard to which there could be no comparison.
Beginning to compare them according to the flesh, he says: “as also Moses in all His house.” He does not immediately prove Christ’s superiority over Moses, lest the hearers recoil and at once stop their ears.
Although they were believers, in their soul they were still much devoted to Moses.
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“Who is faithful,” he says, “to Him who made Him.” What does “made Him” mean? Apostle and High Priest. He is not speaking here about essence or Divinity, but for the moment about human prerogatives.
“As also Moses in all His house,” that is, among the people, or in the temple. He uses the expression “in all His house” as one would speak about members of a household.
Moses was among the people like a steward and manager in a house. That he here calls the people a house is clear from the addition: “whose house we are” (Heb 3:6), that is, we are His creation.
What does “faithful to Him who appointed Him” mean? It means one who cares for His own, intercedes for them, and does not allow them to be shaken in any way.
“As also Moses in all His house.” That is, know who and what our High Priest is, and you will have no need of any other consolation or encouragement.
He calls Him Apostle because He was sent from God the Father. He calls Him High Priest of our confession, that is, of the faith.
He said well, “as also Moses.” As to Moses a people was entrusted, so also to Him was the leadership of a people, though higher and in higher matters.