Those who know God do not know him merely on the principles of visions or dreams. Even if you say I saw God in a dream, that does not mean that you have known God. God is only known through His Word.
And this book contain wisdom, knowledge and understanding of the word of God which was hidden for ages but has now been revealed by the Holy Spirit. The book contain the following teachings: The spirit of the scripture, The mystery of His will, The mystery of Christ, The mystery of Godliness and The msytery of marriage. These has been revealed for our glory so that through them we should attain sonship.