to distil its precious juice. The most hidden corners of nature are
investigated; chemistry separates material objects into their ultimate
elements, and creates worlds of her own; alchemists enrich the province
of physical science; the microscopic glance of a Schwammerdam surprises
nature in her most secret operations. Man goes still further; necessity
or curiosity transcends the boundaries set by superstition: he seizes the
knife, takes courage, and the masterpiece of nature is discovered, even
man. Thus did it behoove the least, the poorest, to help us to reach the
highest; disease and death must lend their aid to man in teaching him
Gnothi seauton ("Know thyself!"). The plague produced and formed our
Hippocrates, our Sydenhams, as war is the mother of generals; and we owe
to the most devastating disease that ever visited humanity an entire
reformation of our medical system.

Our intention was to show the influence upon the perfecting of the soul
through the temperate enjoyment of the pleasures held out by the senses;
and how marvellously has the matter changed, even while under our hands!
We found that even excess and abuse in this direction have furthered the
real demands of humanity; the deflections from the primitive end of
nature--merchants, conquerors, and luxury--have, undoubtedly, tended to
hasten a progress which had otherwise been more regular, but very slow.
Let us compare the old world with the new! In the first, desire was
simple, its satisfaction easy; but how mistaken, how painful was the
judgment passed on nature and her laws! Now, the road is made more
difficult by a thousand windings, but how full the light that has been
shed upon all our conceptions!

We may, then, repeat: Man needed to be an animal before he knew that he
was a spirit; he needed to crawl in the dust before he ventured on a
Newtonian flight through the universe. The body, therefore, is the first