Hebrews 3:5

in all his house i.e. in all God's house. Two "houses" are contemplated, Mosaism and Christianity, the Law and the Gospel. Both were established by God. In the household of the Law, Moses was the faithful minister; in the household of the Gospel, Christ took on Him, indeed, "the form of a slave," and as such was faithful even unto death, but yet was Son overthe House. This seems a more natural explanation than that the writer regards both the covenants as one Household, inwhich Moses was a servant, and overwhich Christ was a Son.

as a servant The word used is not doulos"slave," nor diakonos"minister," but therapôn"voluntary attendant." It is also applied to Moses in the Ep. of Barnabas and in Exodus 14:31 (LXX.).

for a testimony of those things which were to be spoken after They were to be spoken afterwards by Christ, the Prophet to whom Moses had pointed, Deuteronomy 18:15. The Law and the Prophets did but witnessto the righteousness of God which was to be fully revealed in Christ (Romans 3:21). They were but a shadow of the coming reality (Hebrews 10:1). But although it is natural for us to understand the expression in this way, the author possibly meant no more than that the faithfulness of Moses was an attestation of the Law which was about to be delivered.