Hebrews 3:5

And Moses indeed was faithful in all his house as a servant, as a testimony of those things which were afterward to be spoken.

This designation of Moses as a servant is founded on the word of God himself (Numbers 12:7); and this entitled the author of Hebrews to conclude that Moses was not the great lawgiver through any power and ability of himself alone, but that it was his capacity as God's representative and as a vessel for the conveyance of God's message that his noble work was achieved. Furthermore, Moses delivered the Christian system embryonically, as well as the Judaic. In the prophecies about Christ, in the minute details of the tabernacle and all its furnishings, and in the definite instructions for all the feasts, sacrifices, and ceremonies of the Judaic system, all so faithfully delivered by Moses, the entire body of truth delivered by Moses foretold and eventually proved the redemptive ministry of Christ. The Christian system is contained prophetically in the old. Moses did not merely deliver the Judaic system of religion; but, in the sense that the flower is contained in the bud, he delivered the Christian system also, identified in this verse as "those things afterward to be spoken." Westcott stated it thus:

The position of Moses and of the Mosaic dispensation was provisional. Moses not only witnessed to the truths which his legislation plainly declared, but also to the truths which were to be made plain afterward.[3]