4. Since the Spirit of a child has lived before, why does it not show itself as it really is right from birth? Everything in God's work is full of wisdom. A child needs special care which only a mother's tenderness can bestow, tenderness which stems from the frailty and ingenuousness of the child. For a mother, her child is always an angel and this is the way it must be in order to captivate concern. She would not be able to offer the same solicitude if, in place of ingenuousness, she saw virility and adult ideas in the infantile features, nor if she came to know the past of that incarnate Spirit.
From the time of birth ideas gradually take on shape and impulse according to the development of the organs, from which it is possible to say that during the first years the Spirit is truly a child, because all ideas which form the true character remain dormant. During this period of dormancy, in which the instincts are also latent, the Spirit is more malleable, more accessible to impressions which can modify the character and which helps the Spirit progress. All of which makes it easier for the parents to educate the child at this stage.
The Spirit then, wears a temporary tunic of innocence and so Jesus was right when, not withstanding the anteriority of the soul, He takes a child as the symbol of purity and simplicity.