A Heavenly Culture is manifest where the mindset of the sons of God comply with the heart of their heavenly Father. Where the word has become flesh in them, that His grace and truth may be on display for men to see. This requires that the word of God to become a living reality in the lives of those who walk after Him.
One of the ways this can become our reality is through meditation on the word of God, as Joshua was charged, and Psalm 1 encourages. We are to meditate on His word day and night. The words of the Word of God must not depart from our mouths. We should continuously mumble and deeply think of what he has called us to, what He has promised, what he has commanded, and what He has done in the past.