This fallacy says that people mistakenly believe that children are connected to the Divine in a similar way as those mystics who transcend ego. I don't think this is mistaken at all.
What is Love? How do we know it? How are we One in it? The mystical experience shows us directly not only what Love is, but that we are Love.
We operate from two identities simultaneously during our life, but one of those identities is greater, and is the one that we should strive to know, and be One with.