Interpretation:Oyasama was the first parent of human beings. God created the first parents from components of both heaven and earth. From earth, the instruments (sea creatures) existing in the muddy ancient ocean, and from heaven, the pure original mind of God. This is why understanding the Origin of human beings is important. We must all return to the Original mind that was given to the first parents.
Heaven's Truths, in Living the Joyous Life 