As you read the book, there are principles that will help you develop your spiritual senses, and how to Walk in Divine Direction: you will also get prophetic insight (Psalm 119:105, your word is a lamp to my feet and a light to my path.)
The word of God is the only source of life for a Christian. Please understand that just as we express our five senses in the natural, they can also be express in the spiritual realm. Remember you're a spirit-being, you have a soul and you dwell in a body (Your spirit, soul and body is what make you a complete human being).