This is the spirit of the method to be laid down. In this case examples and illustrations are useless, for here we find the beginning of the countless differences of character, and every example I gave would possibly apply to only one case in a hundred thousand. It is at this age that the clever teacher begins his real business, as a student and a philosopher who knows how to probe the heart and strives to guide it aright. While the young man has not learnt to pretend, while he does not even know the meaning of pretence, you see by his look, his manner, his gestures, the impression he has received from any object presented to him; you read in his countenance every impulse of his heart; by watching his expression you learn to protect his impulses and actually to control them. It has been commonly observed that blood, wounds, cries and groans, the preparations for painful operations, and everything which directs the senses towards things connected with suffering, are usually the first to make an impression on all men. The idea of destruction, a more complex matter, does not have so great an effect; the thought of death affects us later and less forcibly, for no one knows from his own experience what it is to die; you must have seen corpses to feel the agonies of the dying. But when once this idea is established in the mind, there is no spectacle more dreadful in our eyes, whether because of the idea of complete destruction which it arouses through our senses, or because we know that this moment must come for each one of us and we feel ourselves all the more keenly affected by a situation from which we know there is no escape. These various impressions differ in manner and in degree, according to the individual character of each one of us and his former habits, but they are universal and no one is altogether free from them. There are other impressions less universal and of a later growth, impressions most suited to sensitive souls, such impressions as we receive from moral suffering, inward grief, the sufferings of the mind, depression, and sadness. There are men who can be touched by nothing but groans and tears; the suppressed sobs of a heart labouring under sorrow would never win a sigh; the sight of a downcast visage, a pale and gloomy countenance, eyes which can weep no longer, would never draw a tear from them. The sufferings of the mind are as nothing to them; they weigh them, their own mind feels nothing; expect nothing from such persons but inflexible severity, harshness, cruelty. They may be just and upright, but not merciful, generous, or pitiful. They may, I say, be just, if a man can indeed be just without being merciful.