BOOK I PART IV
or person. Nay farther, even with relation to
that succession, we coued only admit of those
perceptions, which are immediately present to
our consciousness, nor coued those lively im-
ages, with which the memory presents us, be
ever received as true pictures of past percep-
tions. The memory, senses, and understanding
are, therefore, all of them founded on the imag-
ination, or the vivacity of our ideas.
No wonder a principle so inconstant and fal-
lacious should lead us into errors, when im-
plicitly followed (as it must be) in all its vari-
ations. It is this principle, which makes us rea-
son from causes and effects; and it is the same
principle, which convinces us of the continued
existence of external objects, when absent from
the senses. But though these two operations
be equally natural and necessary in the human