A problem adequately stated is a problem well on its way to being solved.

Thou mayest as well expect to grow stronger by always eating as wiser by always reading. Too much overcharges Nature, and turns more into disease than nourishment. 'Tis thought and digestion which makes books serviceable, and give health and vigor to the mind.

There is an inherently minimum set of essential concepts and current information, cognizance of which could lead to our operating our planet Earth to the lasting satisfaction and health of all humanity.

... reform the environment and not man; being absolutely confident that if you give man the right environment, he will behave favorably.

Pollution is merely a resource that isn't being used properly.

The most important thing about Spaceship Earth - an instruction book didn't come with it.

It is one of the strange facts of experience that when we try to think about the future, our thoughts jump backwards. It may well be that nature has some fundamental metaphysical law by which opening up what we call the future also opens up the past in equal degree.