We have reached the moral order at last; we have just taken the second step towards manhood. If this were the place for it, I would try to show how the first impulses of the heart give rise to the first stirrings of conscience, and how from the feelings of love and hatred spring the first notions of good and evil. I would show that justice and kindness are no mere abstract terms, no mere moral conceptions framed by the understanding, but true affections of the heart enlightened by reason, the natural outcome of our primitive affections; that by reason alone, unaided by conscience, we cannot establish any natural law, and that all natural right is a vain dream if it does not rest upon some instinctive need of the human heart. [Footnote: The precept "Do unto others as you would have them do unto you" has no true foundation but that of conscience and feeling; for what valid reason is there why I, being myself, should do what I would do if I were some one else, especially when I am morally certain I never shall find myself in exactly the same case; and who will answer for it that if I faithfully follow out this maxim, I shall get others to follow it with regard to me? The wicked takes advantage both of the uprightness of the just and of his own injustice; he will gladly have everybody just but himself. This bargain, whatever you may say, is not greatly to the advantage of the just. But if the enthusiasm of an overflowing heart identifies me with my fellow-creature, if I feel, so to speak, that I will not let him suffer lest I should suffer too, I care for him because I care for myself, and the reason of the precept is found in nature herself, which inspires me with the desire for my own welfare wherever I may be. From this I conclude that it is false to say that the precepts of natural law are based on reason only; they have a firmer and more solid foundation. The love of others springing from self-love, is the source of human justice. The whole of morality is summed up in the gospel in this summary of the law.] But I do not think it is my business at present to prepare treatises on metaphysics and morals, nor courses of study of any kind whatsoever; it is enough if I indicate the order and development of our feelings and our knowledge in relation to our growth. Others will perhaps work out what I have here merely indicated.