obstacle to his system, the absurd belief of "innate ideas," of notions of
objects before objects were presented to observation. Our philosopher
considered that this simple analogy sufficiently described the manner in
which he conceived the impressions of the senses write themselves on the
mind. His French pupils, the amusing Helvetius, or Diderot, for they
were equally concerned in the paradoxical "L'Esprit," inferred that this
blank paper served also as an evidence that men had _an equal aptitude for
genius_, just as the blank paper reflects to us whatever characters we
trace on it. This _equality of minds_ gave rise to the same monstrous
doctrine in the science of metaphysics which that of another verbal
misconception, _the equality of men_, did in that of politics. The
Scottish metaphysicians powerfully combined to illustrate the mechanism of
the mind,--an important and a curious truth; for as rules and principles
exist in the nature of things, and when discovered are only thence drawn
out, genius unconsciously conducts itself by a uniform process; and
when this process had been traced, they inferred that what was done by
some men, under the influence of fundamental laws which regulate the
march of the intellect, must also be in the reach of others, who, in the
same circumstances, apply themselves to the same study. But these
metaphysicians resemble anatomists, under whose knife all men are alike.
They know the structure of the bones, the movement of the muscles, and
where the connecting ligaments lie! but the invisible principle of life
flies from their touch. It is the practitioner on the living body who
studies in every individual that peculiarity of constitution which forms
the idiosyncrasy.

Under the influence of such novel theories of genius, JOHNSON defined it
as "A Mind of large general powers ACCIDENTALLY determined by some
_particular direction_." On this principle we must infer that the
reasoning LOCKE, or the arithmetical DE MOIVRE, could have been the