For this the suffering of others is not a means for the attainment of the ends of its own will, but an end in itself. The more definite explanation of this phenomenon is as follows:—Since man is a manifestation of will illuminated by the clearest knowledge, he is always contrasting the actual and felt satisfaction of his will with the merely possible satisfaction of it which knowledge presents to him. Hence arises envy: every privation is infinitely increased by the enjoyment of others, and relieved by the knowledge that others also suffer the same privation. Those ills which are common to all and inseparable from human life trouble us little, just as those which belong to the climate, to the whole country. The recollection of greater sufferings than our own stills our pain; the sight of the sufferings of others soothes our own. If, now, a man is filled with an exceptionally intense pressure of will,—if with burning eagerness he seeks to accumulate everything to slake the thirst of his egoism, and thus experiences, as he inevitably must, that all satisfaction is merely apparent, that the attained end never fulfils the promise of the desired object, the final appeasing of the fierce pressure of will, but that when fulfilled the wish only changes its form, and now torments him in a new one; and indeed that if at last all wishes are exhausted, the pressure of will itself remains without any conscious motive, and makes itself known to him with fearful pain as a feeling of terrible desolation and emptiness; if from all this, which in the case of the ordinary degrees of volition is only felt in a small measure, and only produces the ordinary degree of melancholy, in the case of him who is a manifestation of will reaching the point of extraordinary wickedness, there necessarily springs an excessive inward misery, an eternal unrest, an incurable pain; he seeks indirectly the alleviation which directly is denied him,—seeks to mitigate his own suffering by the sight of the suffering of others, which at the same time he recognises as an expression of his power. The suffering of others now becomes for him an end in itself, and is a spectacle in which he delights; and thus arises the phenomenon of pure cruelty, blood-thirstiness, which history exhibits so often in the Neros and Domitians, in the African Deis, in Robespierre, and the like.