That generation and death are to be regarded as something belonging to life, and essential to this phenomenon of the will, arises also from the fact that they both exhibit themselves merely as higher powers of the expression of that in which all the rest of life consists. This is through and through nothing else than the constant change of matter in the fixed permanence of form; and this is what constitutes the transitoriness of the individual and the permanence of the species. Constant nourishment and renewal differ from generation only in degree, and constant excretion differs only in degree from death. The first shows itself most simply and distinctly in the plant. The plant is throughout a constant recurrence of the same impulse of its simplest fibre, which groups itself into leaf and branch. It is a systematic aggregate of similar plants supporting each other, whose constant reproduction is its single impulse. It ascends to the full satisfaction of this tendency through the grades of its metamorphosis, finally to the blossom and fruit, that compendium of its existence and effort in which it now attains, by a short way, to that which is its single aim, and at a stroke produces a thousand-fold what, up till then, it effected only in the particular case—the repetition of itself. Its earlier growth and development stands in the same relation to its fruit as writing stands to printing. With the animal it is clearly quite the same. The process of nourishing is a constant reproduction; the process of reproduction is a higher power of nourishing. The pleasure which accompanies the act of procreation is a higher power of the agreeableness of the sense of life. On the other hand, excretion, the constant exhalation and throwing off of matter, is the same as that which, at a higher power, death, is the contrary of generation. And if here we are always content to retain the form without lamenting the discarded matter, we ought to bear ourselves in the same way if in death the same thing happens, in a higher degree and to the whole, as takes place daily and hourly in a partial manner in excretion: if we are indifferent to the one, we ought not to shrink from the other. Therefore, from this point of view, it appears just as perverse to desire the continuance of an individuality which will be replaced by other individuals as to desire the permanence of matter which will be replaced by other matter. It appears just as foolish to embalm the body as it would be carefully to preserve its excrement. As to the individual consciousness which is bound to the individual body, it is absolutely interrupted every day by sleep. Deep sleep is, while it lasts, in no way different from death, into which, in fact, it often passes continuously, as in the case of freezing to death. It differs only with regard to the future, the awaking. Death is a sleep in which individuality is forgotten; everything else wakes again, or rather never slept.(64)