If God is not unchanging, then the whole basis of our faith begins to fall apart, and our understanding of the universe begins to unravel. This is because our faith and hope and knowledge all ultimately depend on a person who is infinitely worthy of trust - because he is absolutely and eternally unchanging in his being, perfections, purposes, and promises.
Wayne GrudemElection is an act of God before creation in which He chooses some people to be saved, not on account of any foreseen merit in them, but only because of His sovereign good pleasure.
Wayne GrudemThe idea that all the words in Scripture are God's words in such a way that to disbelieve or disobey any word of Scripture is to disbelieve or disobey God.
Wayne GrudemIn one sense the doctrine of the trinity is a mystery that we will never understand fully.
Wayne GrudemOur justification from sins takes place at the point of saving faith, not at the point of water baptism, which usually occurs later. But if a person is already justified and has sins forgiven eternally at the point of saving faith, then baptism is not necessary for forgiveness of sins nor for the bestowal of new spiritual life. Baptism, then, is not necessary for salvation. But it is necessary if we are to be obedient to Christ, for he commanded baptism for all who believe in him.
Wayne Grudem