Well put. I did indeed believe that he had transcended the definition of adulthood, and that he had reached that state by discipline and growth as an adult, and refound his inner child.
“But arrival would be the birth of a new creature- a child by definition, with many childlike attributes”. Indeed, the Divine Child is one of the Jungian archetypes, and its birth is part of the ongoing
process of spiritual development as an adult, once one has outgrown the mother complex.
See Introduction to a Science of Mythology: The Myth of the Divine Child and the Mysteries of Eleusis by Jung and Carl Kerenyi.