To require a citizen to sign a loyalty oath is to destroy some of the loyalty he could otherwise claim, since any subsequent loyal behavior may then be attributed to the oath.

Behavior is shaped and maintained by its consequences

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

I've often said that my rats have taught me much more than I've taught them.

Those who have had anything useful to say have said it far too often, and those who have had nothing to say have been no more reticent.

Any single historical event is too complex to be adequately known by anyone. It transcends all the intellectual capacities of men. Our practice is to wait until a sufficient number of details have been forgotten. Of course things seem simpler then! Our memories work that way; we retain the facts which are easiest to think about.

An important fact about verbal behavior is that speaker and listener may reside within the same skin.