However, the properly organized environment is not everything. Even in intellectual education it was not the spontaneous exercise alone which refreshed the intelligence; but further, the lessons of the teacher which confirmed and illuminated the internal order in process of development. On these occasions she said: "This is red, this is green." Now she will say: "This is right, this is wrong." And it will not be unusual to find children like the one described above, who make good and evil the center of consciousness, and, placing it above material bread and intellectual nourishment, will propound the question more vital to them than any other: "What is good? and what is evil?" But we must not forget that moral lessons should be brief; and that Moses, the father of the sages, in order to inculcate morality, not in a child, but in a race, gave ten simple commandments, which to Christ seemed superfluous. It is true, however, that at the head of these was the "law" of love; and that Christ substituted for the Decalogue an amplification of that law, which comprises within itself all legislations and moral codes. * * * * * It is possible that good and evil may be distinguished by means of an "internal sense," apart from cognitions of morality; and in such a case, of course, the good and evil in question would be absolute; that is to say, they would be bound up with life itself and not with acquired social habits. We always speak of a "voice of conscience" which teaches us from within to distinguish the two things: good confers serenity, which is order; enthusiasm, which is strength; evil is signalized as an anguish which is at times unbearable: remorse, which is not only darkness and disorder, but fever, a malady of the soul. It is certain that the laws of society, public opinion, material well-being, and threats of peril would all be powerless to produce these various sensations. Often serenity is to be found among the unfortunate, whereas the remorse of Lady Macbeth, who saw the spot of blood upon her hand, gnawed at the heart of one who had acquired a kingdom.