When people declare out of their mouth that they do not know or understand the bible (Word of God); they do not know God. For He is His Word and His Word is Him; they are not separate. Darkness cannot comprehend light. The more you surrender (delight) yourself in the Lord; the more your eyes will be open to the Word and your understanding will be clear. The more the Light of God can come in (Jesus). It is only when you clean your heart and release those things that are not like God that you will clearly understand His Word. It is only when you truly understand His Word that you TRULY understand Him. You have to do this. Asking God to do it will not get it done.
Here is a resource that will provide you with step by step answers to keeping your heart clean and you mind free. Click here to get a copy.