Hebräer 3:6

But Christ--was and is faithful (Heb 3:2). 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.

In this chapter the apostle applies what he had said in the chapter foregoing concerning the priesthood of Christ, I. In a serious pathetic exhortation that this great high priest, who was discovered to them, might be seriously considered by them (Heb 3:1-6). II. He then adds many weighty counsels and cautions (Heb 3:7 to the end).

3:6 We are part of Christ’s house if we keep our courage. The author could not give unqualified assurance to those who were drifting away from Christ and the church. Those who persevere in the faith have assurance that they are part of God’s house (see 3:14; Rom 8:9, 17; 11:22; 2 Cor 13:5; Col 1:22-23).