If in autumn we consider the little world of insects, and see how one prepares its bed to sleep the long, rigid winter‐sleep; another spins its cocoon to pass the winter as a chrysalis, and awake in spring rejuvenated and perfected; and, finally, how most of them, intending themselves to rest in the arms of death, merely arrange with care the suitable place for their egg, in order to issue forth again from it some day renewed;—this is nature’s great doctrine of immortality, which seeks to teach us that there is no radical difference between sleep and death, but the one endangers existence just as little as the other. The care with which the insect prepares a cell, or hole, or nest, deposits its egg in it, together with food for the larva that will come out of it in the following spring, and then quietly dies, is just like the care with which in the evening a man lays ready his clothes and his breakfast for the next morning, and then quietly goes to sleep; and at bottom it could not take place at all if it were not that the insect which dies in autumn is in itself, and according to its true nature, just as much identical with the one which is hatched out in the spring as the man who lies down to sleep is identical with the man who rises from it. If now, after these considerations, we return to ourselves and our own species, then cast our glance forward far into the future, and seek to present to our minds the future generations, with the millions of their individuals in the strange form of their customs and pursuits, and then interpose with the question: Whence will all these come? Where are they now? Where is the fertile womb of that nothing, pregnant with worlds, which still conceals the coming races? Would not the smiling and true answer to this be, Where else should they be than there where alone the real always was and will be, in the present and its content?—thus with thee, the foolish questioner, who in this mistaking of his own nature is like the leaf upon the tree, which, fading in autumn and about to fall, complains at its destruction, and will not be consoled by looking forward to the fresh green which will clothe the tree in spring, but says lamenting, “I am not these! These are quite different leaves!” Oh, foolish leaf! Whither wilt thou? And whence should others come? Where is the nothing whose abyss thou fearest? Know thine own nature, that which is so filled with thirst for existence; recognise it in the inner, mysterious, germinating force of the tree, which, constantly _one_ and the same in all generations of leaves, remains untouched by all arising and passing away. And now, οἱη περ φυλλων γενεη, τοιηδε και ανδρων (_Qualis foliorum generatio, talis et hominum_). Whether the fly which now buzzes round me goes to sleep in the evening, and buzzes again tomorrow, or dies in the evening, and in spring another fly buzzes which has sprung from its egg: that is in itself the same thing; but therefore the knowledge which