Charles Ellicott Commentary Romans 9:14

"What shall we say then? Is there unrighteousness with God? God forbid." — Romans 9:14 (ASV)

Is there unrighteousness?—Again, as in Romans 3:5, the Apostle anticipates a possible objection. Does not this apparently arbitrary choice of one and rejection of another imply injustice in Him who exercises it? The thought is not to be entertained.

On verses 14-18:

These verses contain the second part of the vindication. This power of choosing one and refusing another has always been reserved to Himself by God; as is seen by the examples of Moses and Pharaoh.