Finally, let me say that the personality of the master or principal of the school is the chief factor of moral influence in it. Put a great, sound, whole-souled nature at the head of a school, and everything else may almost be taken for granted. In every school there exists a public opinion among the scholars, by which they are affected to a far greater degree than by the words of their superiors. The tactful master will direct his chief attention to shaping and improving this public opinion, while at the same time interfering as little as possible with the freedom of his pupils. He can accomplish his purpose by drawing close to himself those scholars who make the public opinion of the school, and these in turn he can win to fine and manly views only by the effect of his personality. The personality of the head-master is everything. It is the ultimate source of power in the school, the central organ which sends out its life-giving currents through the whole organism. And let me here add that, if I am in favor of excluding direct religious teaching from our schools, I am not in favor of excluding religious influence. That, too, flows from the personality of the true master. For if he be reverent, a truly pious soul, humble in his estimate of self, not valuing his petty schoolmaster's authority on its own account, but using it lovingly as an instrument for higher ends, he will be sure to communicate of his spirit to his pupils, and by that spirit will open their hearts, better than by any doctrinal teaching he could give, to the reception of the highest spiritual truths. By all these means--by the culture of the intellect, the taste, and the feelings, by his daily dealings with the young, in work and play--the teacher helps to create in them certain moral habits. Why, then, should not these habits suffice? What need is there of specific moral instruction? And what is the relation of moral instruction to the habits thus engendered? The function of moral instruction is to clinch the habits. The function of moral instruction is to explicate in clear statements, fit to be grasped by the intellect, the laws of duty which underlie the habits. The value of such intellectual statements is that they give a rational underpinning to moral practice, and, furthermore, that they permit the moral rules to be applied to new cases not heretofore brought within the scope of habit. This thought will be more fully developed and explained as we proceed. FOOTNOTE: [4] In the address on the subject, reprinted in the Appendix. IV. CLASSIFICATION OF DUTIES. The topics of which moral instruction treats are the duties of life. To teach the duties, however, we must adopt some system of classification. To which system shall we give the preference? The difficulty which we encountered at the outset seems to meet us here in a new guise.