No one asks how to motivate a baby. A baby naturally explores everything it can get at, unless restraining forces have already been at work. And this tendency doesn't die out, it's wiped out.

In the world at large we seldom vote for a principle or a given state of affairs. We vote for a man who pretends to believe in that principle or promises to achieve that state. We don't want a man, we want a condition of peace and plenty-- or, it may be, war and want-- but we must vote for a man.

A first principle not formally recognized by scientific methodologists: when you run into something interesting, drop everything else and study it.

When we say that a man controls himself, we must specify who is controlling whom.

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

We admire people to the extent that we cannot explain what they do, and the word 'admire' then means 'marvel at.'

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