One has
only to observe in so many nonliterate cultures
the secure, healthy, happy faces of the
children, their merry laughter and tenderness
toward each other, their playfulness and
complete trust in their elders, to realize how
firmly rooted their happy development has
been in the unconditional love they have
received from their parents, and how much
of this must have come from contact with the
mother from the child’s earliest days.“