Isaiah 51:1,2

Hearken to me, &c.— The Messiah, about to comfort the true church remaining in the land of Judea, which consisted of a small number, called by him a little flock, and whom he had just before marked out as a small company fearing the Lord,—begins with a gracious address, calling them a company following after righteousness, seeking Jehovah, and demanding attention from them. He orders them to look to Abraham and Sarah, from whom they derived their original, who alone being called by God to enjoy the blessings of a new and higher dispensation, were increased by his remarkable blessing, and multiplied into an immense number; that they might understand hereby, that they, the true heirs of the blessing of Abraham, should enjoy the same privilege of the divine blessing: and this foundation of comfort being laid down, Isaiah 51:1 he immediately explains the purpose of the divine grace, whereby it was determined to place the church, formed of this seed, in a happy and prosperous state, abounding with all the goods of divine grace and true consolation, that they might exhibit a type of the blessing of Abraham and Sarah, Isaiah 51:3. The reader will easily discern that the third verse is figurative: in its primary sense referring to the state of Sion, after the restoration from Babylon; in its secondary and spiritual sense, to the redemption of the church by the Messiah, and the consequent blessings of grace. See chap. Isaiah 49:19 Isaiah 52:9.