The substance of man cannot be measured by Gross National Product.

Call a thing immoral or ugly, soul-destroying or a degradation to man, a peril to the peace of the world or to the well-being of future generations: as long as you have not shown it to be "uneconomic" you have not really questioned its right to exist, grow, and prosper.

That soul-destroying, meaningless, mechanical, moronic work is an insult to human nature which must necessarily and inevitably produce either escapism or aggression, and that no amount of 'bread and circuses' can compensate for the damage done-these are facts which are neither denied nor acknowledged but are met with an unbreakable conspiracy of silence-because to deny them would be too obviously absurd and to acknowledge them would condemn the central preoccupation of modern society as a crime against humanity.

An ounce of practice is generally worth more than a ton of theory.

Modern man talks of a battle with nature, forgetting that, if he won the battle, he would find himself on the losing side

There is incredible generosity in the potentialities of Nature. We only have to discover how to utilize them.

Any intelligent fool can make things bigger and more complex... It takes a touch of genius - and a lot of courage to move in the opposite direction.