The ways of nature,--who can map them, or fathom them, or interpret them, or do much more than read a hint correctly here and there? Of one thing we may be pretty certain, namely, that the ways of wild nature may be studied in our human ways, inasmuch as the latter are an evolution from the former, till we come to the ethical code, to altruism and self-sacrifice. Here we seem to breathe another air, though probably this code differs no more from the animal standards of conduct than our physical atmosphere differs from that of early geologic time.
Our moral code must in some way have been evolved from our rude animal instincts. It came from within; its possibilities were all in nature. If not, where were they?
I have seen disinterested acts among the birds, or what looked like such, as when one bird feeds the young of another species when it hears them crying for food. But that a bird would feed a grown bird of another species, or even of its own, to keep it from starving, I have my doubts. I am quite positive that mice will try to pull one of their fellows out of a trap, but what the motive is, who shall say? Would the same mice share their last crumb with their fellow if he were starving? That, of course, would be a much nearer approach to the human code, and is too much to expect. Bees will clear their fellows of honey, but whether it be to help them, or to save the honey, is a question.
In my youth I saw a parent weasel seize one of its nearly grown young which I had wounded and carry it across an open barway, in spite of my efforts to hinder it. A friend of mine, who is a careful observer, says he once wounded a shrike so that it fell to the ground, but before he got to it, it recovered itself and flew with difficulty toward some near trees, calling to its mate the while; the mate came and seemed to get beneath the wounded bird and buoy it up, so aiding it that it gained the top of a tall tree, where my friend left it. But in neither instance can we call this helpfulness entirely disinterested, or pure altruism.
Emerson said that he was an endless experimenter with no past at his back. This is just what Nature is. She experiments endlessly, seeking new ways, new modes, new forms, and is ever intent upon breaking away from the past. In this way, as Darwin showed, she attains to new species. She is blind, she gropes her way, she trusts to luck; all her successes are chance hits. Whenever I look over my right shoulder, as I sit at my desk writing these sentences, I see a long shoot of a honeysuckle that came in through a crack of my imperfectly closed window last summer. It came in looking, or rather feeling, for something to cling to. It first dropped down upon a pile of books, then reached off till it struck the window-sill of another large window; along this it crept, its regular leaves standing up like so many pairs of green ears, looking very pretty. Coming to the end of the open way there, it turned to the left and reached out into vacancy, till it struck another window-sill running at right angles to the former; along this it traveled nearly half an inch a day, till it came to the end of that road. Then it ventured out into vacant space again, and pointed straight toward me at my desk, ten feet distant. Day by day it kept its seat upon the window-sill, and stretched out farther and farther, almost beckoning me to give it a lift or to bring it support. I could hardly resist its patient daily appeal. Late in October it had bridged about three feet of the distance that separated us, when, one day, the moment came when it could maintain itself outright in the air no longer, and it fell to the floor. "Poor thing," I said, "your faith was blind, but it was real. You knew there was a support somewhere, and you tried all ways to find it." This is Nature. She goes around the circle, she tries every direction, sure that she will find a way at some point. Animals in cages behave in a similar way, looking for a means of escape. In the vineyard I see the grape-vines reaching out blindly in all directions for some hold for their tendrils. The young arms seize upon one another and tighten their hold as if they had at last found what they were in search of. Stop long enough beside one of the vines, and it will cling to you and run all over you.