According to my doctrine, there are no objects which we can, by merely surveying them and without consulting experience, discover to be the causes of anything else; and no objects that we can certainly discover in the same manner not to be the causes ·of specified other things·. Anything can produce anything. Creation, annihilation, motion, reason, volition—all these can arise from one another, or from any other object we can imagine. You won’t find this strange if you hold in your mind together two principles that I have explained: •that the constant conjunction of objects determines their causation, and •that strictly speaking no objects are contrary to each other but existence and non-existence (see i.5). Where objects are not contrary, nothing hinders them from having the constant conjunction on which the relation of cause and effect totally depends.