It is the amazing fact that there are two Kinds of Knowledge in the world today, and we have never contrasted them or compared them.
One is Knowledge that we have obtain through the sense of sight, hearing, touch, taste, and smell. The other is a Revelation from God.
God created man, a spirit being and gave to him a body for the home of the spirit. Through his physical body man was to contact the outward world which was to be his home. The knowledge of this world was to come to him through the medium of his five senses. The purpose of the nervous system was never to reveal God to man; man was to know God through his spirit.
When man died spiritually, that is, became separated from God, he was left without a channel through which to know God. It then became necessary for God to meet man on the level of the medium through which he gained his knowledge. God has done this and this revelation is known to us as the Bible.