A grain of corn, for example, has never been accustomed to find itself in a hen’s stomach—neither it nor its forefathers. For a grain so placed leaves no offspring, and hence cannot transmit its experience. The first minute or so after being eaten, it may think it has just been sown, and begin to prepare for sprouting, but in a few seconds, it discovers the environment to be unfamiliar; it therefore gets frightened, loses its head, is carried into the gizzard, and comminuted among the gizzard stones. The hen succeeded in putting it into a position with which it was unfamiliar; from this it was an easy stage to assimilating it entirely. Once assimilated, the grain ceases to remember any more as a grain, but becomes initiated into all that happens to, and has happened to, fowls for countless ages. Then it will attack all other grains whenever it sees them; there is no such persecutor of grain, as another grain when it has once fairly identified itself with a hen.

We may remark in passing, that if anything be once familiarised with anything, it is content. The only things we really care for in life are familiar things; let us have the means of doing what we have been accustomed to do, of dressing as we have been accustomed to dress, of eating as we have been accustomed to eat, and let us have no less liberty than we are accustomed to have, and last, but not least, let us not be disturbed in thinking as we have been accustomed to think, and the vast majority of mankind will be very fairly contented—all plants and animals will certainly be so. This would seem to suggest a possible doctrine of a future state; concerning which we may reflect that though, after we die, we cease to be familiar with ourselves, we shall nevertheless become immediately familiar with many other histories compared with which our present life must then seem intolerably uninteresting.

This is the reason why a very heavy and sudden shock to the nervous system does not pain, but kills outright at once; while one with which the system can, at any rate, try to familiarise itself is exceedingly painful. We cannot bear unfamiliarity. The part that is treated in a manner with which it is not familiar cries immediately to the brain—its central government—for help, and makes itself generally as troublesome as it can, till it is in some way comforted. Indeed, the law against cruelty to animals is but an example of the hatred we feel on seeing even dumb creatures put into positions with which they are not familiar. We hate this so much for ourselves, that we will not tolerate it for other creatures if we can possibly avoid it. So again, it is said, that when Andromeda and Perseus had travelled but a little way from the rock where Andromeda had so long been chained, she began upbraiding him with the loss of her dragon, who, on the whole, she said, had been very good to her. The only things we really hate are unfamiliar things, and though nature would not be nature if she did not cross our love of the familiar with a love also of the unfamiliar, yet there can be no doubt which of the two principles is master.

Let us return, however, to the grain of corn. If the grain had had presence of mind to avoid being carried into the gizzard stones, as many seeds do which are carried for hundreds of miles in birds’ stomachs, and if it had persuaded itself that the novelty of the position was not greater than it could very well manage to put up with—if, in fact, it had not known when it was beaten—it might have stuck in the hen’s stomach and begun to grow; in this case it would have assimilated a good part of the hen before many days were over; for hens are not familiar with grains that grow in their stomachs, and unless the one in question was as strongminded for a hen, as the grain that could avoid being assimilated would be for a grain, the hen would soon cease to take an interest in her antecedents. It is to be doubted, however, whether a grain has ever been grown which has had strength of mind enough to avoid being set off its balance on finding itself inside a hen’s gizzard. For living organism is the creature of habit and routine, and the inside of a gizzard is not in the grain’s programme.

Suppose, then, that the grain, instead of being carried into the gizzard, had stuck in the hen’s throat and choked her. It would now find itself in a position very like what it had often been in before. That is to say, it would be in a damp, dark, quiet place, not too far from light, and with decaying matter around it. It would therefore know perfectly well what to do, and would begin to grow until disturbed, and again put into a position with which it might, very possibly, be unfamiliar.

The great question between vast masses of living organism is simply this: “Am I to put you into a position with which your forefathers have been unfamiliar, or are you to put me into one about which my own have been in like manner ignorant?” Man is only the dominant animal on the earth, because he can, as a general rule, settle this question in his own favour.

The only manner in which an organism, which has once forgotten its antecedents, can ever recover its memory, is by being assimilated by a creature of its own kind; one, moreover, which knows its business, or is not in such a false position as to be compelled to be aware of being so. It was, doubtless, owing to the recognition of this fact, that some Eastern nations, as we are told by Herodotus, were in the habit of eating their deceased parents—for matter which has once been assimilated by any identity or personality, becomes for all practical purposes part of the assimilating personality.

The bearing of the above will become obvious when we return, as we will now do, to the question of personal identity. The only difficulty would seem to lie in our unfamiliarity with the real meanings which we attach to words in daily use. Hence, while recognising continuity without sudden break as the underlying principle of identity, we forget that this involves personal identity between all the beings who are in one chain of descent, the numbers of such beings, whether in succession, or contemporaneous, going for nothing at all. Thus we take two eggs, one male and one female, and hatch them; after some months the pair of fowls so hatched, having succeeded in putting a vast quantity of grain and worms into false positions, become full-grown, breed, and produce a dozen new eggs.

Two live fowls and a dozen eggs are the present phase of the personality of the two original eggs. They are also part of the present phase of the personality of all the worms and grain which the fowls have assimilated from their leaving the eggshell; but the personalities of these last do not count; they have lost their grain and worm memories, and are instinct with the memorises of the whole ancestry of the creature which has assimilated them.

We cannot, perhaps, strictly say that the two fowls and the dozen new eggs actually are the two original eggs; these two eggs are no longer in existence, and we see the two birds themselves which were hatched from them. A bird cannot be called an egg without an abuse of terms. Nevertheless, it is doubtful how far we should not say this, for it is only with a mental reserve—and with no greater mental reserve—that we predicate absolute identity concerning any living being for two consecutive moments; and it is certainly as free from quibble to say to two fowls and a dozen eggs, “you are the two eggs I had on my kitchen shelf twelve months ago,” as to say to a man, “you are the child whom I remember thirty years ago in your mother’s arms.” In either case we mean, “you have been continually putting other organisms into a false position, and then assimilating them, ever since I last saw you, while nothing has yet occurred to put you into such a false position as to have made you lose the memory of your antecedents.”