The Holy Spirit will reveal the truth but we need courage to ask. Not everyone wants the truth revealed about themselves or their relationships. The truth does not set a person free who refuses to listen. We shall never truly know the truth until we are taught directly by the Holy Spirit.
No amount of human teaching, no matter who our teachers may be, will ever give us a correct, exact, and full apprehension of the truth. Not even a diligent study of the bible will give us a real understanding of the truth. We must be taught directly by the Holy Spirit therefore the one who is taught will understand the truth of God as a whole.