Science is a willingness to accept facts even when they are opposed to wishes.

Do not intervene between a person and the consequences of their own behavior.

Indeed one of the ultimate advantages of an education is simply coming to the end of it.

The extent to which human aggression exemplifies innate tendencies is not clear.

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.

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.

In a world of complete economic equality, you get and keep the affections you deserve. You can't buy love with gifts or favors, you can't hold love by raising an inadequate child, and you can't be secure in love by serving as a good scrub woman or a good provider.