If, we are to know God personally and live according to his will, we need a more detailed knowledge than the physical creation can provide...We need God's written Word.
God's Word is the authoritative revelation of God's will for us. The knowledge that comes from it gives us new life, confidence, wisdom, joy, understanding and purity.
It has a worth that is beyond value, and brings an enjoyment that is beyond comparison. It warns and instructs us, making us more sensitive to sin and giving us an increased desire to cleanse our lives and live blamelessly.
As the Word does its work, we will want all our thoughts, words and actions to be pleasing to God.
Psalms 19:7-14