ut God, that can produce any notion in the World, and all other
Agents, which we believe to be the _Cause_ of this or that Motion, are no
more but the _Occasion_ thereof. In doing this, he advances certain
_Axioms_, and Conclusions, which are in short,

a. The _Axioms_: That no substance has that of it self, which it can loose,
without ceasing to be, what it is: That every body may loose of its motion,
till it have no more left, without ceasing to be a Body: That we cannot
conceive but two sorts of substances, _vid._ a _Spirit_ (or _That which
thinketh_) and a _Body_, wherefore they must be considered as the Causes of
all, that happens, and what cannot proceed from the one, must necessarily
be adscribed to the other: That to _Move_, or to cause motion, is an
Action: That an Action cannot be continued but by the Agent, who began it.

b. The _Conclusions_: That no _Body_ hath Motion of it self: That the First
Mover of Bodies not a Body: That it cannot be but a _Spirit_, that is the
First Mover: That it cannot be but the same Spirit, who has begun to move
Bodies, that continues to move.

In the _Fifth_, He treats of the Union of the Body and Soul, and the
manner, how they act one upon the other; and esteems it not more difficult
to conceive the Action of Spirits upon Bodies, and of Bodies upon Spirits,
than to conceive the Action of Bodies upon Bodies: the cause of the great
difficulty in understanding the two former, arising (according to him) from
thence, that we will conceive the one by the other, not considering, that
every thing acting according to its own nature, we shall never know the
action of one Agent, if we will examine it by the notions we have of
another, that is of a quite differing nature. Here he notes, that the
Action of Bodies upon Bodies is not {309} more known to us; than that of
Spirits upon Bodies, or of Bodies upon Spirits; and yet most men admire
nothing but _this_, believing to know the _other_; whereas he Judges, that
all things being well examin'd, the Action of Bodies upon Bodies is no more
conceivable, than that of Spirits upon Bodies. Mean while the opinion of
the Authour touching this subject, is, That the union of Soul and Body
consists onely in this, that certain motions of the Body are followed by
certain _Cogitations_ of the Soul, and, on the contrary, that certain
Thoughts of the Soul are follow'd by certain _Motions_ of the Body. And,
having supposed, that Bodies are said to act upon o