The total absence of the idea of the species in Christianity is especially observable in its characteristic doctrine of the universal sinfulness of men. For there lies at the foundation of this doctrine the demand that the individual shall not be an individual, a demand which again is based on the presupposition that the individual by himself is a perfect being, is by himself the adequate presentation or existence of the species. [122] Here is entirely wanting the objective perception, the consciousness, that the thou belongs to the perfection of the I, that men are required to constitute humanity, that only men taken together are what man should and can be. All men are sinners. Granted; but they are not all sinners in the same way; on the contrary, there exists a great and essential difference between them. One man is inclined to falsehood, another is not; he would rather give up his life than break his word or tell a lie; the third has a propensity to intoxication, the fourth to licentiousness; while the fifth, whether by favour of Nature, or from the energy of his character, exhibits none of these vices. Thus, in the moral as well as the physical and intellectual elements, men compensate for each other, so that, taken as a whole, they are, as they should be, they present the perfect man. Hence intercourse ameliorates and elevates; involuntarily and without disguise, man is different in intercourse from what he is when alone. Love especially works wonders, and the love of the sexes most of all. Man and woman are the complement of each other, and thus united they first present the species, the perfect man. [123] Without species, love is inconceivable. Love is nothing else than the self-consciousness of the species as evolved within the difference of sex. In love, the reality of the species, which otherwise is only a thing of reason, an object of mere thought, becomes a matter of feeling, a truth of feeling; for in love, man declares himself unsatisfied in his individuality taken by itself, he postulates the existence of another as a need of the heart; he reckons another as part of his own being; he declares the life which he has through love to be the truly human life, corresponding to the idea of man, i.e., of the species. The individual is defective, imperfect, weak, needy; but love is strong, perfect, contented, free from wants, self-sufficing, infinite; because in it the self-consciousness of the individuality is the mysterious self-consciousness of the perfection of the race. But this result of love is produced by friendship also, at least where it is intense, where it is a religion, [124] as it was with the ancients. Friends compensate for each other; friendship is a means of virtue, and more: it is itself virtue, dependent however on participation. Friendship can only exist between the virtuous, as the ancients said. But it cannot be based on perfect similarity; on the contrary, it requires diversity, for friendship rests on a