as a son over his own house - rather, “over His (God’s, Heb 3:4) house”; and therefore, as the inference from His being one with God, over His own house. So Heb 10:21, “having an High Priest over the house of God.” Christ enters His Father’s house as the Master [OVER it], but Moses as a servant [IN it, Heb 3:2, Heb 3:5] [Chrysostom]. An ambassador in the absence of the king is very distinguished - in the presence of the king he falls back into the multitude [Bengel].
whose house are we - Paul and his Hebrew readers. One old manuscript, with Vulgate and Lucifer, reads, “which house”; but the weightiest manuscripts support English Version reading.
the rejoicing - rather, “the matter of rejoicing.”
of the hope - “of our hope.” Since all our good things lie in hopes, we ought so to hold fast our hopes as already to rejoice, as though our hopes were realized [Chrysostom].
firm unto the end - omitted in Lucifer and Ambrose, and in one oldest manuscript, but supported by most oldest manuscripts.