Man was created to glorify God. I cannot explain Calvinism, predestination, etc., as eloquently as others here, but I would recommend you research it. I once thought as you, but through studying the Bible, Reformed Theology and Arminianism, I have come to believe that God is Sovereign and may elect whom he chooses. He is God. I cannot wrap my feeble mind around many aspects of God, but why should I be able to?