To describe an animal as a physico-chemical system of extreme complexityis no doubt perfectly correct, except that it misses out on the animalness of the animal.

Infinite growth of material consumption in a finite world is an impossibility.

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.

An attitude to life which seeks fulfillment in the single-minded pursuit of wealth - in short, materialism - does not fit into this world, because it contains within itself no limiting principle, while the environment in which it is placed is strictly limited.

At present, there can be little doubt that the whole of mankind is in mortal danger, not because we are short of scientific and technological know-how, but because we tend to use it destructively, without wisdom. More education can help us only if produces more wisdom.

By means of trees, wildlife could be conserved, pollution decreased, and the beauty of our landscapes enhanced. This is the way, or at least one of the ways, to spiritual, moral, and cultural regeneration.

There are poor societies which have too little; but where is the rich society that says: 'Halt! We have enough'? There is none.