Romans 9:15

Verse 15. For he saith to Moses. Ex 33:19. I will have mercy. This is said by God when he declared expressly that he would make all his goodness pass before Moses, (Ex 33:19) and when, therefore, it was regarded not as a proof of stern and inexorable justice, but as the very proof of his benevolence, and the highest which he thought proper to exhibit. When men, therefore, under the influence of an unrenewed and hostile heart, charge this as an unjust and arbitrary proceeding, they are resisting and perverting that which God regards as the very demonstration of his benevolence.