We have seen that the careful selection for the satisfaction of the sexual impulse, a selection which rises through innumerable degrees up to that of passionate love, depends upon the highly serious interest which man takes in the special personal constitution of the next generation. Now this exceedingly remarkable interest confirms two truths which have been set forth in the preceding chapters. (1.) The indestructibility of the true nature of man, which lives on in that coming generation. For that interest which is so lively and eager, and does not spring from reflection and intention, but from the inmost characteristics and tendencies of our nature, could not be so indelibly present and exercise such great power over man if he were absolutely perishable, and were merely followed in time by a race actually and entirely different from him. (2.) That his true nature lies more in the species than in the individual. For that interest in the special nature of the species, which is the root of all love, from the passing inclination to the serious passion, is for every one really the highest concern, the success or failure of which touches him most sensibly; therefore it is called _par excellence_ the affair of the heart. Moreover, when this interest has expressed itself strongly and decidedly, everything which merely concerns one’s own person is postponed and necessarily sacrificed to it. Through this, then, man shows that the species lies closer to him than the individual, and he lives more immediately in the former than in the latter. Why does the lover hang with complete abandonment on the eyes of his chosen one, and is ready to make every sacrifice for her? Because it is his immortal part that longs after her; while it is only his mortal part that desires everything else. That vehement or intense longing directed to a particular woman is accordingly an immediate pledge of the indestructibility of the kernel of our being, and of its continued existence in the species. But to regard this continued existence as something trifling and insufficient is an error which arises from the fact that under the conception of the continued life of the species one thinks nothing more than the future existence of beings similar to us, but in no regard identical with us; and this again because, starting from knowledge directed towards without, one takes into consideration only the external form of the species as we apprehend it in perception, and not its inner nature. But it is just this inner nature which lies at the foundation of our own consciousness as its kernel, and hence indeed is more immediate than this itself, and, as thing in itself, free from the _principium individuationis_, is really the same and identical in all individuals, whether they exist together or after each other. Now this is the will to live, thus just that which desires life and continuance so vehemently. This accordingly is spared and unaffected by death.