God used both Pharaoh and Judas for important events in the course of the world. Listen to what God says about those whom He chooses: Romans 9:15-18 KJV For he saith to Moses, I will have mercy on whom I will have mercy, and I will have compassion on whom I will have compassion.  So then it is not of him that willeth, nor of him that runneth, but of God that sheweth mercy.  For the scripture saith unto Pharaoh, Even for this same purpose have I raised thee up, that I might shew my power in thee, and that my name might be declared throughout all the earth.  Therefore hath he mercy on whom he will have mercy , and whom he will he hardeneth. Not only this, though. It is recorded that Pharaoh actually repented. Exodus 14:4 KJV And I will harden Pharaoh's heart, that he shall follow after them; and I will be honoured upon Pharaoh, and upon all his host; that the Egyptians may know that I am the Lord . And they did so. Judas also repented: Matthew 27:3 KJV Then Judas, which had betrayed him, when he saw that he was condemned, repented himself, and brought again the thirty pieces of silver to the chief priests and elders, I also want to research King Nebuchadnezzar, but I don't know that chapter or book. I think it's the book of Daniel. In conclusion, you can see, God shows mercy upon those He chooses by making them repent of their sins after job is done. They also usually die afterwards.