experience, or in our mental nature, constitute a sufficient, or indeed any, reason for believing that this is nowhere the case. The grounds, therefore, which warrant us in rejecting such a supposition with respect to any of the phenomena of which we have experience, must be sought elsewhere than in any supposed necessity of our intellectual faculties. "As was observed in a former place, the belief we entertain in the universality, throughout nature, of the law of cause and effect, is itself an instance of induction; and by no means one of the earliest which any of us, or which mankind in general, can have made. We arrive at this universal law by generalisation from many laws of inferior generality. The generalising propensity which, instinctive or not, is one of the most powerful principles of our nature, does not indeed wait for the period when such a generalisation becomes strictly legitimate. The mere unreasoning propensity to expect what has been often experienced, doubtless led men to believe that every thing had a cause, before they could have conclusive evidence of that truth. But even this cannot be supposed to have happened until many cases of causation, or, in other words, many partial uniformities of sequence, had become familiar. The more obvious of the particular uniformities suggest and prove the general uniformity; and that general uniformity, once established, enables us to prove the remainder of the particular uniformities of which it is made up. * * * "With respect to the general law of causation, it does appear that there must have been a time when the universal prevalence of that law throughout nature could not have been affirmed in the same confident and unqualified manner as at present. There was a time when many of the phenomena of nature must have appeared altogether capricious and irregular, not governed by any laws, nor steadily consequent upon any causes. Such phenomena, indeed, were commonly, in that early stage of human knowledge, ascribed to the direct intervention of the will of some supernatural being, and therefore still to a cause. This shows the strong tendency of the human mind to ascribe every phenomenon to some cause or other; but it shows also that experience had not, at that time, pointed out any regular order in the occurrence of those particular phenomena, nor proved them to be, as we now know that they are, dependent upon prior phenomena as their proximate causes. There have been sects of philosophers who have admitted what they termed Chance as one of the agents in the order of nature by which certain classes of events were entirely regulated; which could only mean that those events did not occur in any fixed order, or depend upon uniform laws of causation. * * *