". . . even after we have experience of the operations of cause and effect, our conclusions from that experience are not founded on reasoning . . ." (P 176a)

"In reality, all arguments from experience are founded on the similarity which we discover among natural objects, and by which we are induced to expect effects similar to those which we have found to follow from such objects." (P 176a)

"From causes which appear similar we expect similar effects. This is the sum of all our experimental conclusions." (P 176a)

"[I]f this conclusion were formed by reason, it would be as perfect at first, and upon one instance, as after ever so long a course of experience. But the case is far otherwise." (P 176b)