"We are all passengers aboard one ship, the Earth, and we must not allow it to be wrecked. There will be no second Noah's Ark."
"The problem the world faces today is that only one-third of the world's population lives in decent circumstances, while half the population of the world lives on one or two dollars a day. "
"It is my firm belief that the infinite and uncontrollable fury of nuclear weapons should never be held in the hands of any mere mortal ever again, for any reason."
"We must treat water as if it were the most precious thing in the world, the most valuable natural resource. Be economical with water! Don't waste it! We still have time to do something about this problem before it is too late."