The Spirits' Book
Book Two - The Spirit World
Chapter VII - Return to Physical Life
380. During infancy, despite the imperfection of its organs hindering its full expression, does a spirit think as a child or an adult?
“While existing as a child, a spirit’s organs of intelligence do not give it the complete intuition of an adult as they are not yet fully developed. The individual’s intellect is narrow in scope, until age has matured his or her reason. The confusion that accompanies incarnation does not immediately end at birth; it gradually dissolves with the development of the bodily organs.
Childhood dreams do not have the same character as those of adults. Their object is almost always childish, an indication of the nature of a spirit’s thoughts. This is a perfect example that supports this answer.”