Isaiah 51:2

Look unto Abraham your father, and unto Sarah [that] bare you: for I called him alone, and blessed him, and increased him.

Ver. 2. Look unto Abraham your father.] "Look" and again "look." "Hearken" and again "hearken." These poor Jews, before the coming of Christ in the flesh, were vino somnoque sepulti, drunk with the cup of God's fury, Isa 51:17 and so fast asleep, that they needed to be thus roused and raised up to the hope of better times, which now were at hand.

And unto Sarah that bare you.] By the force of her faith also, Heb 11:11 her son Isaac was emeritae fidel filius. Now these domestic examples are alleged to assure them that God could do the like again in respect of spiritual children, Abraham's right seed. Gal 4:22-31

For I called him alone.] Be not ye therefore troubled at your aloneness.

And blessed him, and increased him.] God's benediction is his benefaction; the Pope's is not so; fumos vendit, fumo pereat.