knowledge of whatever kind, are not in the least the cause, or the real basis of morality; these are nevertheless indispensable for a moral course of life. They are the cistern or reservoir, in which the habit of mind, that springs from the fount of all morality (a fount not at all moments flowing), may be stored up, thence to be drawn off, as occasion requires. There is thus an analogy between things moral and things physiological; among many instances of which we need only mention that of the gall-bladder, which is used for keeping the secretion of the liver. Without firmly held principles we should inevitably be at the mercy of the antimoral incentives, directly they are roused to activity by external influences; and self-control lies precisely in steadfast adherence and obedience to such principles, despite the motives which oppose them.