So you claim to believe in God, but you deny that God's Holy Spirit can fill and inspire men to write the truth, as God tells them to, is that about right? How can you believe in, and deny the power of God, at the same time?
I guess it is really true that men can not understand the Bible without the divine guidance of God. People speak of the OT and the NT as being two different things. The entire Bible, from Genesis to Revelation, centers on Jesus Christ. If a person does not know this, then they do not read the Bible with Spiritual understanding. It is that Spiritual understanding, given by Christ, that brings God's word to life. If the Bible is not words of life to you, then you have no understanding of it.