The Mass Of The Reading Public Is

Very Few Established Institutions, Governments And Constitutions ...are Ever Destroyed By Their Enemies Until They Have Been Corrupted And Weakened By Their Friends.

Whether Or Not Birth Control Is Eugenic, Hygienic, And Economic, It Is The Most Revolutionary Practice In The History Of Sexual Morals.

Unless The Reformer Can Invent Something Which Substitutes Attractive Virtues For Attractive Vices, He Will Fail.

Because The Results Are Expressed In Numbers, It Is Easy To Make The Mistake Of Thinking That The Intelligence Test Is A Measure Like A Foot Ruler Or A Pair Of Scales. It Is, Of Course, A Quite Different Sort Of Measure. Intelligence Is Not An Abstraction Like Length And Weight; It Is An Exceedingly Complicated Notion - Which Nobody Has Yet Succeeded In Defining.

Robinson Crusoe, The Self-sufficient Man, Could Not Have Lived In New York City.