"In every healthy economy the substance with which it works is preserved and used sparingly, so that consumption and destruction do not overstep the limit beyond which the substance itself would be endangered or destroyed. Since technology presupposes destruction, since its development depends upon destruction, it cannot be fitted into any healthy economic system; one cannot look at it from an economic point of view. The radical consumption of oil, coal, and ore cannot be called economy, however rational the methods of drilling and mining. Underlying strict rationality of technical working methods, we find a way of thinking which cares nothing for the preservation and saving of the substance."