The Kingdom of Heaven is not a place, but a state of mind.

Nature teaches more than she preaches. There are no sermons in stones. It is easier to get a spark out of a stone than a moral.

Few persons realize how much of their happiness is dependent upon their work, upon the fact that they are busy and not left to feed upon themselves. Blessed is the person who has some congenial work, some occupation in which to place one's heart, and which affords a complete outlet to all the forces that are in him or her.

Travel and society polish one, but a rolling stone gathers no moss, and a little moss is a good thing on a man.

Joy in the universe, and keen curiosity about it all - that has been my religion.

The United States says "We're complying. We're following the disarmament obligation. Look at the quantitative reductions that are taking place." But, since '96, there really hasn't been progress on specific commitments that have been made. Perhaps most disturbing is this: that the United States and France in particular, since 1996, have expanded the range of circumstances under which they might use - they say they might use - nuclear weapons.

Science makes no claim to infallibility; it leaves that claim to be made by theologians.