God revealed to man the truth he needed to know but could not possess, neither discover nor invent by natural means or human genius. God revealed His Word, which, in all its parts, in its every thought and word, is the verbally, plenarily inspired, inerrant, and infallible Word of God.
John 1:1
1 In the beginning was the Word, and the Word was with God, and the Word was God. 2 He was with God in the beginning.

3 Through him all things were made; without him nothing was made that has been made. 4 In him was life, and that life was the light of men. 5 The light shines in the darkness, but the darkness has not understooda it.