BOOK I PART III
SECTIONIV. OF THECOMPONENTPARTS OF
OURREASONING CONCERNINGCAUSE AND
EFFECT
Though the mind in its reasonings from
causes or effects carries its view beyond those
objects, which it sees or remembers, it must
never lose sight of them entirely, nor reason
merely upon its own ideas, without some mix-
ture of impressions, or at least of ideas of the
memory, which are equivalent to impressions.
When we infer effects from causes, we must es-
tablish the existence of these causes; which we
have only two ways of doing, either by an im-
mediate perception of our memory or senses,
or by an inference from other causes; which
causes again we must ascertain in the same
manner, either by a present impression, or by
an inference from their causes, and so on, till