In this sense, then, birth may indeed be looked upon as the most salient feature in a man’s life; but this is not at all the sense in which it is commonly so regarded. It is commonly considered as the point at which we begin to live. More truly it is the point at which we leave off knowing how to live.
A chicken, for example, is never so full of consciousness, activity, reasoning faculty, and volition, as when it is an embryo in the eggshell, making bones, and flesh, and feathers, and eyes, and claws, with nothing but a little warmth and white of egg to make them from. This is indeed to make bricks with but a small modicum of straw. There is no man in the whole world who knows consciously and articulately as much as a half-hatched hen’s egg knows unconsciously. Surely the egg in its own way must know quite as much as the chicken does. We say of the chicken that it knows how to run about as soon as it is hatched. So it does; but had it no knowledge before it was hatched? What made it lay the foundations of those limbs which should enable it to run about? What made it grow a horny tip to its bill before it was hatched, so that it might peck all round the larger end of the eggshell and make a hole for itself to get out at? Having once got outside the eggshell, the chicken throws away this horny tip; but is it reasonable to suppose that it would have grown it at all unless it had known that it would want something with which to break the eggshell? And again, is it in the least agreeable to our experience that such elaborate machinery should be made without endeavour, failure, perseverance, intelligent contrivance, experience, and practice?
In the presence of such considerations, it seems impossible to refrain from thinking that there must be a closer continuity of identity, life, and memory, between successive generations than we generally imagine. To shear the thread of life, and hence of memory, between one generation and its successor, is so to speak, a brutal measure, an act of intellectual butchery, and like all such strong high-handed measures, a sign of weakness in him who is capable of it till all other remedies have been exhausted. It is mere horse science, akin to the theories of the convulsionists in the geological kingdom, and of the believers in the supernatural origin of the species of plants and animals. Yet it is to be feared that we have not a few among us who would feel shocked rather at the attempt towards a milder treatment of the facts before them, than at a continuance of the present crass tyranny with which we try to crush them inside our preconceived opinions. It is quite common to hear men of education maintain that not even when it was on the point of being hatched, had the chicken sense enough to know that it wanted to get outside the eggshell. It did indeed peck all round the end of the shell, which, if it wanted to get out, would certainly be the easiest way of effecting its purpose; but it did not, they say, peck because it was aware of this, but “promiscuously.” Curious, such a uniformity of promiscuous action among so many eggs for so many generations. If we see a man knock a hole in a wall on finding that he cannot get out of a place by any other means, and if we see him knock this hole in a very workmanlike way, with an implement with which he has been at great pains to make for a long the past, but which he throws away as soon as he has no longer use for it, thus showing that he had made it expressly for the purpose of escape, do we say that this person made the implement and broke the wall of his prison promiscuously? No jury would acquit a burglar on these grounds. Then why, without much more evidence to the contrary than we have, or can hope to have, should we not suppose that with chickens, as with men, signs of contrivance are indeed signs of contrivance, however quick, subtle, and untraceable, the contrivance may be? Again, I have heard people argue that though the chicken, when nearly hatched, had such a glimmering of sense that it pecked the shell because it wanted to get out, yet that it is not conceivable that, so long before it was hatched, it should have had the sense to grow the horny tip to its bill for use when wanted. This, at any rate, they say, it must have grown, as the persons previously referred to would maintain, promiscuously.