3. if so be—expressed according to human conceptions; not as if God did not foreknow all contingencies, but to mark the obstinacy of the people and the difficulty of healing them; and to show His own goodness in making the offer which left them without excuse [CALVIN].

     10. God repented of the evil—When the message was sent to them, they were so ripe for judgment that a purpose of destruction to take effect in forty days was the only word God's righteous abhorrence of sin admitted of as to them. But when they repented, the position in which they stood towards God's righteousness was altered. So God's mode of dealing with them must alter accordingly, if God is not to be inconsistent with His own immutable character of dealing with men according to their works and state of heart, taking vengeance at last on the hardened impenitent, and delighting to show mercy on the penitent. Compare Abraham's reasoning, Ge 18:25; Eze 18:21-25; Jer 18:7-10. What was really a change in them and in God's corresponding dealings is, in condescension to human conceptions, represented as a change in God (compare Ex 32:14), who, in His essential righteousness and mercy, changeth not (Nu 23:19; 1Sa 15:29; Mal 3:6; Jas 1:17). The reason why the announcement of destruction was made absolute, and not dependent on Nineveh's continued impenitence, was that this form was the only one calculated to rouse them; and at the same time it was a truthful representation of God's purpose towards Nineveh under its existing state, and of Nineveh's due. When that state ceased, a new relation of Nineveh to God, not contemplated in the message, came in, and room was made for the word to take effect, "the curse causeless shall not come" [FAIRBAIRN]. Prophecy is not merely for the sake of proving God's omniscience by the verification of predictions of the future, but is mainly designed to vindicate God's justice and mercy in dealing with the impenitent and penitent respectively (Ro 11:22). The Bible ever assigns the first place to the eternal principles of righteousness, rooted in the character of God, subordinating to them all divine arrangements. God's sparing Nineveh, when in the jaws of destruction, on the first dawn of repentance encourages the timid penitent, and shows beforehand that Israel's doom, soon after accomplished, is to be ascribed, not to unwillingness to forgive on God's part, but to their own obstinate impenitence.