It's not a mystery that most Christians, and non Christians being human by human nature only see and understand Spiritual knowledge in human terms. God being Spirit, Has a different origin than that of mankind his origin being of Adam's nature which is human by nature and not Spiritual... That's why there is a carnal mind set verses a Spiritual mind set. There's a clear separation between the two... God's word repeatedly over numerous times in every book in the new and old testament this is seen. Seeing the separation of the two natures allows us the opportunity to grasp God's concept which is unattached to the human aspect. It isn't about making a better human! It's all about separation of what's human like being joined to Christ death.. human aspect died with Christ, so to produce a new creation in Christ resurrection. A clear separation through death . This to the human nature mind set is a impossibility and the human nature mind rationalizes it will happen when their human body dies. Where as the Spirit of God isn't limited at all with it being a done deal while the human nature lives on in the human body. It's not a human experience it's a Spiritual event! Separation from what is human by nature to see and understand what's Spiritual by nature... That's why there's a two edge sword being ," Word"s of a Spiritual origin ". Human word's to the human understanding is human by origin. Even if God is mentioned. So we have Human understanding of the word of God and we have the Spiritual understanding of God from the same word seen. The separation is missed most of the time due to the human mind set . I'd love to share more..