For as all our reasonings concerning existence are derived from causation, and as all our reasonings concerning causation are derived from the experienced conjunction of objects, not from any reasoning or reflection, the same experience must give us a notion of these objects, and must remove all mystery from our conclusions.

This is so evident, that it would scarce have merited our attention, were it not to obviate certain objections of this kind, which might arise against the following reasonings concerning matter and substance.

I need not observe, that a full knowledge of the object is not requisite, but only of those qualities of it, which we believe to exist.
SECT.XV.RULES BY WHICH TO JUDGE OF CAUSES AND EFFECTS.
According to the precedent doctrine, there are no objects which by the mere survey, without consulting experience, we can determine to be the causes of any other; and no objects, which we can certainly determine in the same manner not to be the causes.

Any thing may produce any thing.
Creation, annihilation, motion, reason, volition; all these may arise from one another, or from any other object we can imagine.

Nor will this appear strange, if we compare two principles explained above, THAT THE CONSTANT CONJUNCTION OF OBJECTS DETERMINES THEIR CAUSATION, AND [Part I.
Sect.