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.

     1. and thou—that is, though thou wast not spoiled—though thou wast not dealt treacherously with (see on Isa 24:16), thy spoiling and treachery are therefore without excuse, being unprovoked.