ted its development and increase of weight, and the head is the
seat of the mind. But as this necessitated greater strength and
resistance in the bones of the pelvis than in those of species whose
head and trunk rest upon all four extremities, the burden fell upon
woman, the author of the Fall according to Genesis, of bringing forth
larger-headed offspring through a harder framework of bone. And Jahwe
condemned her, for having sinned, to bring forth her children in sorrow.

The gorilla, the chimpanzee, the orang-outang, and their kind, must look
upon man as a feeble and infirm animal, whose strange custom it is to
store up his dead. Wherefore?

And this primary disease and all subsequent diseases--are they not
perhaps the capital element of progress? Arthritis, for example, infects
the blood and introduces into it scoriae, a kind of refuse, of an
imperfect organic combustion; but may not this very impurity happen to
make the blood more stimulative? May not this impure blood promote a
more active cerebration precisely because it is impure? Water that is
chemically pure is undrinkable. And may not also blood that is
physiologically pure be unfit for the brain of the vertical mammal that
has to live by thought?

The history of medicine, moreover, teaches us that progress consists
not so much in expelling the germs of disease, or rather diseases
themselves, as in accommodating them to our organism and so perhaps
enriching it, in dissolving them in our blood. What but this is the
meaning of vaccination and all the serums, and immunity from infection
through lapse of time?

If this notion of absolute health were not an abstract category,
something which does not strictly exist, we might say that a perfectly
healthy man would be no longer a man, but an irrational animal.
Irrational, because of the lack of some disease to set a spark to his
reason. And this disease which gives us the appetite of knowing for the
sole pleasure of knowing, for the delight of tasting of the fruit of the
tree of the knowledge of good and evil, is a real disease and a tragic
one.

_Pantes anthropoi ton eidenai oregontai phusei_, "all men
naturally desire to know." Thus Aristotle begins his Metaphysic, and it
has been repeated a thousand times since then that curiosity or the
desire to know, which according to Genesis led our first mother to sin,
is the origin of knowledge.

But it is necessary to distinguish here between the desire or appetite