single Instances of the Operation of Bodies, we never can, by our outmost Scrutiny, discover any Thing but one Event following another, without being able to comprehend any Force or Power, by which the Cause operates, or any Connexion betwixt it and its suppos'd Effect. The same Difficulty occurs in contemplating the Operations of Mind on Body; where we observe the Motion of the latter to follow upon the Volition of the former; but are not able to observe or conceive the Tye, which binds them together, or the Energy, by which the Mind produces this Effect. The Authority of the Will over our own Faculties and Ideas is not a whit more comprehensible: So that upon the whole, there appears not, thro' all Nature, any one Instance of Connexion, that is conceivable by us: All Events seem entirely loose and separate. One Event follows another; but we never can observe any Tye betwixt them: They seem conjoin'd, but never connected. And as we can have no Idea of any Thing, that never appear'd to our outward Sense or inward Sentiment, the necessary Conclusion seems to be, that we have no Idea of Connexion or Power at all, and that these Words are absolutely without any Meaning, when employ'd either in philosophical Reasonings, or common Life.
But we have still one Method of avoiding this Conclusion, and one Source, which we have not yetexamin'd.
