Who was. — Rather, as being; or that He was. Not merely, fix your thought on Jesus; but also (and especially), think of Him as faithful to God (Hebrews 2:17).
Appointed him. — Literally, made Him, an expression which some ancient (Ambrose and other Latin fathers, — apparently also Athanasius) and many modern writers have understood as relating to the creation of the human nature of our Lord. It is probable, however, that 1 Samuel 12:6 is in the writer’s mind. “It is the Lord that made Moses and Aaron, and that brought your fathers up out of the land of Egypt.” As there Samuel speaks of the raising up of Moses and Aaron, constituted by God deliverers of the people; so here our thought must rest on Him who constituted Jesus “Apostle and High Priest.”
As also Moses. — These words, which give the key to the following verses, are quoted from Numbers 12:7, where Moses is placed in contrast with prophets in Israel to whom the Lord will make Himself known by vision or dream. “My servant Moses is not so, who is faithful in all mine house. With him will I speak mouth to mouth.” The “house” or household is God’s. people Israel. To others will God reveal Himself in various ways in regard to the many parts of the house, the many concerns of the household. Throughout the whole house Moses was the recipient of the divine commands, and was faithful — “faithful” (as one of the Targums paraphrases), “as chief of the chiefs of my court.”