Interpretation:
The Kanrodai or Central Pillar is important because it is the proof of the Origin of human beings. God created human beings from the existing creatures from the muddy ocean, and placed the pure mind of God into the first parents. Therefore human beings were meant to live the Joyous life. This is why God in the Ofudesaki wants us to understand the origin. The Kanrodai is the proof of the origin of human beings.
Heaven's Truths, in Living the Joyous Life 