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 police-reports 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.