14 What shall we say then? Is there unrighteousness with God? God forbid. 15 For he saith to Moses, I will have mercy on whom I will have mercy, and I will have compassion on whom I will have compassion. (Romans 9:14-15 KJV)
William Burkitt’s Commentary
The apostle having by the two foregoing instances asserted his doctrine, concerning the purpose and decree of God to justify those that should believe in his Son, be they Gentiles or Jews: and consequently made it good, that no word or promise of God falls to the ground by the rejection of the unbelieving Jews; proceeds in this verse to demonstrate the righteousness of God in the execution of this his purpose.
Is there then, says he, unrighteousness or injustice with God? God forbid. As if the apostle had said, “Is there any cause to say, That God, who preferred the posterity of Isaac before that of Ishmael, and the seed of Jacob before the numerous offspring of Esau; is there any just reason to say that God is no unjust in calling the Gentiles and, upon their faith, owning them for his people, the spiritual seed of Abraham, and rejecting the Jews because of their unbelief? God forbid that we should accuse him of unrighteous dealing upon this account.”
Learn hence, That God is just, infallibly and inflexibly just, and righteous in all his dealings with the children of men in all dispensations: Is there unrighteousness with God? That is, there is none, there can be none.
Learn, 2. That all such tenets or doctrines which reflect any manner of unrighteousness upon God, or charge him with hard dealing, ought to be disclaimed with the utmost abhorrence and detestation: Is there unrighteousness with God? God forbid.
Observe next, How the apostle proves that there is no unrighteousness in this dispensation of God in rejecting the Jews and calling the Gentiles because he had said to Moses he would show mercy, where, when, and to whom, or to what people he pleased. If therefore, upon the infidelity of the Jews, he will call the idolatrous Gentiles and receive them to be his people, who can accuse him of any injustice upon that account? Shall not Almighty God dispense his favours where and upon whom he pleases? May he not confer his kindness upon some, which he owes to none?
Learn hence, That God is absolutely and ultimately resolved to follow the counsel of his own will in and about the justification of sinners; and whatsoever he does or resolves to do, his will being the rule of righteousness, is for that reason exactly just and undeniably righteous.