"If you could become a child again, then I could protect you..."
The meaning of the work was that a wounded and traumatized person could once again turn out to be someone who is absolutely cared for and protected. It's hard to say. Like a mother's absolute love. About changing everything from the beginning. It's more about a sincere desire for healing.
The child is unknown to me and this is not at all an allegory for an inner child in need of absolute love. It's about another person who doesn't exist yet, but you already know him.