BOOK I PART I
that no two ideas are in themselves contrary,
except those of existence and non-existence,
which are plainly resembling, as implying both
of them an idea of the object; though the latter
excludes the object from all times and places, in
which it is supposed not to exist.
(7) All other objects, such as fire and water,
heat and cold, are only found to be contrary
from experience, and from the contrariety of
their causes or effects; which relation of cause
and effect is a seventh philosophical relation, as
well as a natural one. The resemblance implied
in this relation, shall be explained afterwards.
It might naturally be expected, that I should
joindifferenceto the other relations. But that I
consider rather as a negation of relation, than
as anything real or positive. Difference is of
two kinds as opposed either to identity or re-