Infancy and youth are plastic
Infancy and youth are plastic. Both body and mind are susceptible to
surrounding influences. If the heredity is unfavorable it can be largely
modified by favorable environments. If a child is born of unhealthy
parents, but without any serious defect, and is intelligently cared for
after birth, it will grow up to be healthy. On the other hand, a child
born of healthy parents that is improperly cared for will become ill and
perhaps die young.