The dictates of custom being dictates of morality, it is obvious that the study of moral ideas will, to a large extent, be a study of customs. But at the same time it should be borne in mind that custom never covers the whole field of morality, and that the uncovered space grows larger in proportion as the moral consciousness develops. Being a rule of duty, custom may only indirectly be an expression of moral approval, by claiming, in certain cases, that goodness should be rewarded. But even when demanding praise, custom is not always a reliable exponent of merit; it includes politeness, and politeness is a great deceiver. Custom may compel us to praise a man for form's sake, when he deserves no praise, and to thank him when he deserves no thanks. Moreover, custom regulates external conduct only. It tolerates all kinds of volitions and opinions if not openly expressed. It does not condemn the heretical mind, but the heretical act. It demands that under certain circumstances certain actions shall be either performed or omitted, and, provided that this demand is fulfilled, it takes no notice of the motive of the agent or omitter. Again, in case the course of conduct prescribed by custom is not observed, the mental facts connected with the transgression, if regarded at all, are dealt with in a rough and ready manner, according to general rules which hardly admit of individualisation. Yet the incongruity between custom and morality which ensues from these circumstances is on {161} the whole more apparent than real. It is rather an incongruity between different moral standards. The unreflecting moral consciousness, like custom, cares comparatively little for the internal aspect of conduct. It does not ask whether a man goes to church on Sunday from a religious motive or from fear of public opinion; it does not ask whether he stays at home from love of ease or from dissent of belief and avoidance of hypocrisy. It is ready to blame as soon as the dictate of custom is disobeyed. The rule of custom is the rule of duty at early stages of development. Only progress in culture lessens its sway.