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 GrudemThe sufficiency of Scripture means that Scripture contained all the words of God he intended his people to have at each stage of redemptive history, and that it now contains all the words of God we need for salvation, for trusting him perfectly, and for obeying him perfectly.
Wayne GrudemThe clarity of Scripture means that the Bible is written in such a way that its teachings are able to be understood by all who will read it seeking God's help and being willing to follow it.
Wayne GrudemIt is scripture alone, not conservative Evangelical tradition or any other human authority, that must function as the normative authority for the definition of what we should believe. The authority of the scripture means 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 Grudem