Think of a hypothesis as a card. A theory is a house made of hypotheses.

What is the essence of America? The essence of America is finding and maintaining that perfect, delicate balance between freedom "to" and freedom "from."

Be able to defend your arguments in a rational way. Otherwise, all you have is an opinion.

Relatively few of us will find the time-or take it-to live an ever enlarging life.

The only real meaning in life can be found in a good man. And maybe Paris. Preferably the two together.

When our spelling is perfect, it's invisible. But when it's flawed, it prompts strong negative associations.

To acquire knowledge, one must study; but to acquire wisdom, one must observe.