There is a perfect correspondence; or 'tis only man modified to live in a mud-bank. A fish in like manner is man furnished to live in the sea; a thrush, to fly in the air; and a mollusk is a cheap edition with a suppression of the costlier illustrations, designed for dingy circulation, for shelving in an oysterbank or among the sea-weed.

If we go through the British Museum or the Jardin des Plantes in Paris, or any cabinet where is some representation of all the kingdoms of nature, we are surprised with occult sympathies; we feel as if looking at our own bone and flesh through coloring and distorting glasses. Is it not a little startling to see with what genius some people take to hunting, with what genius some people fish,—what knowledge they still have of the creature they hunt? The robber, as the policereports say, must have been intimately acquainted with the premises. How lately the hunter was the poor creature's organic enemy; a presumption inflamed, as the lawyers say, by observing how many faces in the street still remind us of visages in the forest,—the escape from the quadruped type not yet perfectly accomplished.

From whatever side we look at Nature we seem to be exploring the figure of a disguised man. How obvious is the momentum in our mental history! The momentum, which increases by exact laws in falling bodies, increases by the same rate in the intellectual action. Every scholar knows that he applies himself coldly and slowly at first to his task, but, with the progress of the work, the mind itself becomes heated, and sees far and wide as it approaches the end, so that it is the common remark of the student, Could I only have begun with the same fire which I had on the last day, I should have done something.

The affinity of particles accurately translates the affinity of thoughts, and what a modern experimenter calls “the contagious influence of chemical action” is so true of mind that I have only to read the law that its application may be evident: “A body in the act of combination or decomposition enables another body, with which it may be in contact, to enter into the same state.” And if one remembers how contagious are the moral states of men, how much we are braced by the presence and actions of any Spartan soul; it does not need vigor of our own kind, but the spectacle of vigor of any kind, any prodigious power of performance wonderfully arms and recruits us. There are those who disputing will make you dispute, and the nervous and hysterical and animalized will produce a like series of symptoms in you, though no other persons ever evoke the like phenomena, and though you are conscious that they do not properly belong to you, but are a sort of extension of the diseases of this particular person into you.

The idea of vegetation is irresistible in considering mental activity. Man seems a higher nlant. What happens here in mankind is matched by what happens out there in the history of grass and wheat. This curious resemblance repeats, in the mental function, the germination, growth, state of melioration, crossings, blight, parasites, and in short all the accidents of the plant. Under every leaf is the bud of a new leaf, and not less under every thought is a newer thought. The plant absorbs much nourishment from the ground in order to repair its own waste by exhalation, and keep itself good. Increase its food and it becomes fertile. The mind is first only receptive. Surcharge it with thoughts in which it delights and it becomes active. The moment a man begins not to be convinced, that moment he begins to convince.

In the orchard many trees send out a moderate shoot in the first summer heat, and stop. They look all summer as if they would presently burst into bud again, but they do not. The fine tree continues to grow. The same thing happens in the man. Every man has material enough in his experience to exhaust the sagacity of Newton in working it out. We have more than we use. I never hear a good speech at caucus or at cattleshow but it helps me, not so much by adding to my knowledge as by apprising me of admirable uses to which what I know can be turned. The commonest remark, if the man could only extend it a little, would make him a genius; but the thought is prematurely checked, and grows no more. All great masters are chiefly distinguished by the power of adding a second, a third, and perhaps a fourth step in a continuous line. Many a man had taken their first step. With every additional step you enhance immensely the value of your first.

The botanist discovered long ago that Nature loves mixtures, and that nothing grows well on the crab-stock, but the blood of two trees being mixed a new and excellent fruit is produced. And not less in human history aboriginal races are incapable of improvement; the dull, melancholy Pelasgi arrive at no civility until the Phoenicians and lonians come in. The Briton, the Pict, is nothing until the Roman, the Saxon, the Norman, arrives.

It is observed that our mental processes go forward even when they seem suspended. Scholars say that if they return to the study of a new language after some intermission, the intelligence of it is more and not less. A subject of thought to which we return from month to month, from year to year, has always some ripeness of which we can give no account.