Romans 9:18-20

9:18 So then, God has mercy on whom he chooses to have mercy, and he hardens whom he chooses to harden.

9:19 You will say to me then, “Why does he still find fault? For who has ever resisted his will?” 9:20 But who indeed are you – a mere human being – to talk back to God? Does what is molded say to the molder, “Why have you made me like this?”