A fourth-grade reader may be a sixth-grade mathematician. The grade is an administrative device which does violence to the nature of the developmental process.

...not everyone is willing to defend a position of 'not knowing.' There is no virtue in ignorance for its own sake.

A permissive government is a government that leaves control to other sources.

A child who has been severely punished for sex play is not necessarily less inclined to continue; and a man who has been imprisoned for violent assault is not necessarily less inclined toward violence.

A person's genetic endowment, a product of the evolution of the species, is said to explain part of the workings of his mind and his personal history the rest.

Behavior is shaped and maintained by its consequences

Men build society and society builds men.