V. The Working Together of the Four Archangels

In this connection there is very little understanding, unfortunately, for how things really are. For example, medical textbooks always describe how man breathes in oxygen from the air and how the carbon within him takes up the oxygen; this process is then compared with external combustion, in which all sorts of external substances combine with oxygen. The whole process in the human organism, whereby oxygen is taken up by carbon, is then called combustion.