Well, but, my dear little man, you must learn to talk about such things, when you grow older, in a very different way from that. You must not talk about "ain't" and "can't" when you speak of this great wonderful world round you, of which the wisest man knows only the very smallest corner, and is, as the great Sir Isaac Newton said, only a child picking up pebbles on the shore of a boundless ocean. You must not say that this cannot be, or that that is contrary to nature. You do not know what Nature is, or what she can do; and nobody knows; not even Sir Roderick Murchison, or Professor Owen, or Professor Sedgwick, or Professor Huxley, or Mr. Darwin, or Professor Faraday, or Mr. Grove, or any other of the great men whom good boys are taught to respect. They are very wise men; and you must listen respectfully to all they say: but even if they should say, which I am sure they never would, "That cannot exist. That is contrary to nature," you must wait a little, and see; for perhaps even they may be wrong. It is only children who read Aunt Agitate's Arguments, or Cousin Cramchild's Conversations; or lads who go to popular lectures, and see a man pointing at a few big ugly pictures on the wall, or making nasty smells with bottles and squirts, for an hour or two, and calling that anatomy or chemistry--who talk about "cannot exist," and "contrary to nature." Wise men are afraid to say that there is anything contrary to nature, except what is contrary to mathematical truth; for two and two cannot make five, and two straight lines cannot join twice, and a part cannot be as great as the whole, and so on (at least, so it seems at present): but the wiser men are, the less they talk about "cannot." That is a very rash, dangerous word, that "cannot"; and if people use it too often, the Queen of all the Fairies, who makes the clouds thunder and the fleas bite, and takes just as much trouble about one as about the other, is apt to astonish them suddenly by showing them, that though they say she cannot, yet she can, and what is more, will, whether they approve or not. And therefore it is, that there are dozens and hundreds of things in the world which we should certainly have said were contrary to nature, if we did not see them going on under our eyes all day long. If people had never seen little seeds grow into great plants and trees, of quite different shape from themselves, and these trees again produce fresh seeds, to grow into fresh trees, they would have said, "The thing cannot be; it is contrary to nature." And they would have been quite as right in saying so, as in saying that most other things cannot be.