19. the angel of God—that is, the pillar of cloud [see on Ex 13:21]. The slow and silent movement of that majestic column through the air, and occupying a position behind them must have excited the astonishment of the Israelites (Isa 58:8). It was an effectual barrier between them and their pursuers, not only protecting them, but concealing their movements. Thus, the same cloud produced light (a symbol of favor) to the people of God, and darkness (a symbol of wrath) to their enemies (compare 2Co 2:16).

     20-25. Behold, I send an Angel before thee, to keep thee in the way—The communication of these laws, made to Moses and by him rehearsed to the people, was concluded by the addition of many animating promises, intermingled with several solemn warnings that lapses into sin and idolatry would not be tolerated or passed with impunity.

     21. my name is in him—This angel is frequently called Jehovah and Elohim, that is, God.

     30, 31. one brought up—an object of special and pleasing regard. The bestowal of wisdom on men is represented by its finding a delightful residence and pleasing God.