Degree of Moral Susceptibility Unknown.—The fact that one has or has not had certain profoundly moving impressions and insights into things—for example, an unjustly executed, slain or martyred father, a faithless wife, a shattering, serious accident,—is the factor upon which the excitation of our passions to white heat principally depends, as well as the course of our whole lives. No one knows to what lengths circumstances (sympathy, emotion) may lead him. He does not know the full extent of his own susceptibility. Wretched environment makes him wretched. It is as a rule not the quality of our experience but its quantity upon which depends the development of our superiority or inferiority, from the point of view of good and evil.