with a certain particle of extended matter? Truly I should like
him to explain this union through its proximate cause. But he
had so distinct a conception of mind being distinct from body,
that he could not assign any particular cause of the union
between the two, or of the mind itself, but was obliged to have
recourse to the cause of the whole universe, that is to God.
Further, I should much like to know, what degree of motion the
mind can impart to this pineal gland, and with what force can it
hold it suspended? For I am in ignorance, whether this gland can
be agitated more slowly or more quickly by the mind than by the
animal spirits, and whether the motions of the passions, which we
have closely united with firm decisions, cannot be again
disjoined therefrom by physical causes; in which case it would
follow that, although the mind firmly intended to face a given
danger, and had united to this decision the motions of boldness,
yet at the sight of the danger the gland might become suspended
in a way, which would preclude the mind thinking of anything
except running away. In truth, as there is no common standard of
volition and motion, so is there no comparison possible between
the powers of the mind and the power or strength of the body;
consequently the strength of one cannot in any wise be determined
by the strength of the other. We may also add, that there is no
gland discoverable in the midst of the brain, so placed that it
can thus easily be set in motion in so many ways, and also that
all the nerves are not prolonged so far as the cavities of the
brain. Lastly, I omit all the assertions which he makes
concerning the will and its freedom, inasmuch as I have
abundantly proved that his premisses are false. Therefore, since
the power of the mind, as I have shown above, is defined by the
understanding only, we shall determine solely by the knowledge of
the mind the remedies against the emotions, which I believe all
have had experience of, but do not accurately observe or
distinctly see, and from the same basis we shall deduce all those
conclusions, which have regard to the mind's blessedness.

AXIOMS.

I. If two contrary actions be started in the same subject, a
change must necessarily take place, either in both, or in one of
the two, and continue until they cease to be contrary.

II. The power of an effect is defined by the power of its cause,
in so far as its essence is explained or defined by the e