“I sense a dark foreboding in man’s separation from his body, as if it heralded the severing of man’s direct link to nature’s laws. This is not a minor issue: it’s about whether man is a human being or a machine. This question is related to even more profound matters — in fact, the most serious matters of all. The most crucial question regarding every human action in this era is how much strain it exercises on nature: the choice is between growth and preservation. This increasing lack of physical exercise does not bode well. The replacement of muscle power with industrial energy means, of course, a great increase of burden, the fiasco of all fiascos.”