“…But remember this table : Age in years Hours of sleep needed 1 14-16 2-3 12-14 4-5 10-12 6-10 10-11 11-16 9 1/2-10 Few things are more important to a child than the right amount of rest and sleep, and modern parents are apt to let their children stay up too late. …”

“…The sex instinct is very powerful, and in any form of society, savage or civilized, it is regulated by many customs and attitudes which make it difficult to discuss with freedom and reason. The modern world tends to become more artificial and complicated; the more artificial our lives become the greater is the strain upon so natural an instinct as sex. …”