as an ethereal substance; others as igneous matter; others again have
compared it to light. DEMOCRITUS made it consist in motion, consequently
gave it a manner of existence. ARISTOXENES, who was himself a musician,
made it harmony. ARISTOTLE regarded the soul as the moving faculty, upon
which depended the motion of living bodies.

The earliest doctors of Christianity had no other idea of the soul, than
that it was material. TERTULLIAN, ARNOBIUS, CLEMENT of ALEXANDRIA,
ORIGEN, SAINT JUSTIN, IRENAEUS, have all of them discoursed upon it; but
have never spoken of it other than as a corporeal substance--as matter.
It was reserved for their successors at a great distance of time, to
make the human soul and the soul of the world _pure spirits_; that is to
say, immaterial substances, of which it is impossible they could form
any accurate idea: by degrees this incomprehensible doctrine of
spirituality, conformable without doubt to the views of those who make
it a principle to annihilate reason, prevailed over the others: But it
might be fairly asked, if the pretended proofs of this doctrine owe
themselves to a man, who on a much more comprehensible point has been
proved in error; if, on that which time has shewn was accessible to
man's reason, the great champion in support of this dogma was deceived;
are we not bound to examine, with the most rigorous investigation, the
reasonings, the evidence, of one who was the decided, the proven child
of enthusiasm and error? Yet DESCARTES, to whose sublime errors the
world is indebted for the Newtonian system, although before him the soul
had been considered spiritual, was the first who established that,
"_that which thinks ought to be distinguished from matter_;" from whence
he concludes rather hastily, that the soul, or that which thinks in man,
is a spirit; or a simple indivisible substance. Perhaps it would have
been more logical, more consistent with reason, to have said, since man,
who is matter, who has no idea but of matter, enjoys the faculty of