known. For the ideas of all things are divinely planted in our souls; for, as the better philosophy teacheth, they are not begotten in us by outward objects or outward causes, but only are by these outward things excited or stirred up.  And this is true, not only in supernatural ideas of God and things divine, and in natural ideas of the natural principles of human understanding, and conclusions thence deduced by the strength of human reason; but even in the ideas of outward objects, which are perceived by the outward senses:  as that noble Christian philosopher Boethius hath well observed; to which also the Cartesian philosophy agreeth.”  I quote only to show the concurrence of others, with Harris’s position.  Barclay carries on his argument with much more of a similar import.  See Sewell’s History, folio, p. 620.

13.  But the doctrine of ideas existing primarily in God, and being divinely planted in our souls, did not originate with Boethius:  it may be traced back a thousand years from his time, through the philosophy of Proclus, Zeno, Aristotle,[40] Plato, Socrates, Parmenides, and Pythagoras.  It is absurd to suppose any production or effect to be more excellent than its cause.  That which really produces motion, cannot itself be inert; and that which actually causes the human mind to think and reason, cannot itself be devoid of intelligence.  “For knowledge can alone produce knowledge.” [41] A doctrine apparently at variance with this, has recently been taught, with great confidence, among the professed discoveries of Phrenology.  How much truth there may be in this new “science,” as it is called, I am not prepared to say; but, as sometimes held forth, it seems to me not only to clash with some of the most important principles of mental philosophy, but to make the power of thought the result of that which is in itself inert and unthinking.  Assuming that the primitive faculties of the human understanding have not been known in earlier times, it professes to have discovered, in the physical organization of the brain, their proper source, or essential condition, and the true index to their measure, number, and distribution.  In short, the leading phrenologists, by acknowledging no spiritual substance, virtually deny that ancient doctrine, “It is not in flesh to think, or bones to reason,” [42] and make the mind either a material substance, or a mere mode without substantial being.

14.  “The doctrine of immaterial substances,” says Dr. Spurzheim, “is not sufficiently amenable to the test of observation; it is founded on belief, and only supported by hypothesis.”—­Phrenology, Vol. i, p. 20.  But it should be remembered, that our notion of material substance, is just as much a matter of hypothesis.  All accidents, whether they be qualities or actions, we necessarily suppose to have some support; and this we call substance, deriving the term from the Latin, or hypostasis,