His outstretched arm. God mentions some heads of the mercies which He had shewn them, when He had made them His people, His redemption of them from Egypt, His guidance through the wilderness, His leading them over the last difficulty to the promised land. The use of the familiar language of the Pentateuch1 is like the touching of so many key-notes, recalling the whole harmony of His love. Moses, Aaron, and Miriam together, are Lawgiver, to deliver and instruct; Priest, to atone; and Prophetess2