What shall we say then? Is there any unrighteousness with God? May it never be! For He says to Moses, “I will have mercy on whom I have mercy, and I will have compassion on whom I have compassion.” So then it does not depend on the one who wills or the one who runs, but on God who has mercy. For the Scripture says to Pharaoh, “For this very purpose I raised you up, in order to demonstrate My power in you, and in order that My name might be proclaimed throughout the whole earth.” So then He has mercy on whom He desires, and He hardens whom He desires.

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And what if God, wanting to demonstrate His wrath and to make His power known, endured with much patience vessels of wrath having been prepared for destruction, and in order that He might make known the riches of His glory upon vessels of mercy, which He prepared beforehand for glory— even us, whom He also called, not from among Jews only, but also from among Gentiles?

— Romans 9:14-18; 22-24