3:6 over God’s house. Note the prepositions: Moses was “in” the house, but Christ is “over” the house (10:21).

we are his house. God’s house consists of His people (1 Sam. 2:35; 2 Sam. 7:16; Eph. 2:19–22; 1 Tim. 3:15; 1 Pet. 2:5), an important theme throughout Scripture.

if indeed we hold fast. This condition tells the readers how they can know that they belong to God—their faith must prove itself by persevering (v. 14; 6:11; 10:23). The note of warning is a fitting introduction to the quotation from Ps. 95 that follows.