Jamieson, Fausset and Brown on Romans 9:14

14. What shall we say then? Is there unrighteousness with God? God forbid--This is the first of two objections to the foregoing doctrine, that God chooses one and rejects another, not on account of their works, but purely in the exercise of His own good pleasure: "This doctrine is inconsistent with the justice of God." The answer to this objection extends to Ro 9:19, where we have the second objection.