It 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 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 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 Grudem