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

Why precisely do we want to change land ownership? The answer seems to me to be quite clear: to inhibit land speculation, to inhibit the private exploitation of the scarcity-value of land, to inhibit as we might say the cornering of land.

The most striking thing about modern industry is that it requires so much and accomplishes so little.

The real problems of our planet are not economic or technical, they are philosophical. The philosophy of unbridled materialism is being challenged by events.

If I limit myself to knowledge that I consider true beyond doubt, I minimize the risk of error but I maximize, at the same time, the risk of missing out on what may be the subtlest, most important and most rewarding things in life.

The best aid to give is intellectual aid, a gift of useful knowledge. A gift of knowledge is infinitely preferable to a gift of material things.

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.