BOOK I PART III
existence of the one from that of the other. In all
those instances, from which we learn the con-
junction of particular causes and effects, both
the causes and effects have been perceived by
the senses, and are remembered But in all cases,
wherein we reason concerning them, there is
only one perceived or remembered, and the
other is supplyed in conformity to our past ex-
perience.
Thus in advancing we have insensibly dis-
covered a new relation betwixt cause and ef-
fect, when we least expected it, and were en-
tirely employed upon another subject. This re-
lation is theirconstant conjunction. Contiguity
and succession are not sufficient to make us
pronounce any two objects to be cause and ef-
fect, unless we perceive, that these two rela-
tions are preserved in several instances. We