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.

Behavior is shaped and maintained by its consequences

A piece of music is an experience to be taken by itself.

The consequences of an act affect the probability of its occurring again.

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

Teachers must learn how to teach ... they need only to be taught more effective ways of teaching.

I may say that the only differences I expect to see revealed between the behavior of the rat and man (aside from enormous differences of complexity) lie in the field of verbal behavior.