Romans 9:18-20

18Therefore God has mercy on whom he wants to have mercy, and he hardens whom he wants to harden. 19One of you will say to me: “Then why does God still blame us? For who is able to resist his will?” 20But who are you, a human being, to talk back to God? “Shall what is formed say to the one who formed it, ‘Why did you make me like this?’ ” Isaiah 29:16; 45:9