BOOK I PART III
ate impression, must become of considerable
moment in all the operations of the mind, and
must easily distinguish itself above the mere
fictions of the imagination. Of these impres-
sions or ideas of the memory we form a kind of
system, comprehending whatever we remem-
ber to have been present, either to our inter-
nal perception or senses; and every particular
of that system, joined to the present impres-
sions, we are pleased to call a reality. But the
mind stops not here. For finding, that with
this system of perceptions, there is another con-
nected by custom, or if you will, by the relation
of cause or effect, it proceeds to the consider-
ation of their ideas; and as it feels that it is in
a manner necessarily determined to view these
particular ideas, and that the custom or rela-
tion, by which it is determined, admits not of
the least change, it forms them into a new sys-