of this passion spring from that suitableness of two individualities to each other on account of which the will, _i.e._, the character, of the father and the intellect of the mother, in their connection, make up precisely that individual towards which the will to live in general which exhibits itself in the whole species feels a longing proportionate to this its magnitude, and which therefore exceeds the measure of a mortal heart, and the motives of which, in the same way, lie beyond the sphere of the individual intellect. This is thus the soul of a true and great passion. Now the more perfect is the mutual adaptation of two individuals to each other in each of the many respects which have further to be considered, the stronger will be their mutual passion. Since there do not exist two individuals exactly alike, there must be for each particular man a particular woman—always with reference to what is to be produced—who corresponds most perfectly. A really passionate love is as rare as the accident of these two meeting. Since, however, the possibility of such a love is present in every one, the representations of it in the works of the poets are comprehensible to us. Just because the passion of love really turns about that which is to be produced, and its qualities, and because its kernel lies here, a friendship without any admixture of sexual love can exist between two young and good‐looking persons of different sex, on account of the agreement of their disposition, character, and mental tendencies; nay, as regards sexual love there may even be a certain aversion between them. The reason of this is to be sought in the fact that a child produced by them would have physical or mental qualities which were inharmonious; in short, its existence and nature would not answer the ends of the will to live as it exhibits itself in the species. On the other hand, in the case of difference of disposition, character, and mental tendency, and the dislike, nay, enmity, proceeding from this, sexual love may yet arise and exist; when it then blinds us to all that; and if it here leads to marriage it will be a very unhappy one.