Such currents, so tyrannical, exist in thoughts, those finest and subtilest of all waters, that as soon as once thought begins, it refuses to remember whose brain it belongs to; what country, tradition, or religion; and goes whirling off—swim we merrily—in a direction self-chosen, by law of thought and not by law of kitchen clock or county committee. It has its own polarity. One of these vortices or self-directions of thought is the impulse to search resemblance, affinity, identity, in all its objects, and hence our science, from its rudest to its most refined theories.
The electric word pronounced by John Hunter a hundred years ago, arrested and progressive development, indicating the way upward from the invisible protoplasm to the highest organisms, gave the poetic key to Natural Science, of which the theories of Geoffroy St. Hilaire, of Oken, of Goethe, of Agassiz and Owen and Darwin in zoölogy and botany, are the fruits,—a hint whose power is not yet exhausted, showing unity and perfect order in physics.
The hardest chemist, the severest analyzer, scornful of all but dryest fact, is forced to keep the poetic curve of nature, and his result is like a myth of Theocritus. All multiplicity rushes to be resolved into unity. Anatomy, osteology, exhibit arrested or progressive ascent in each kind; the lower pointing to the higher forms, the higher to the highest, from the fluid in an elastic sack, from radiate, mollusk, articulate, vertebrate, up to man; as if the whole animal world were only a Hun-terian museum to exhibit the genesis of mankind.
Identity of law, perfect order in physics, perfect parallelism between the laws of Nature and the laws of thought exist. In botany we have the like, the poetic perception of metamorphosis,—that the same vegetable point or eye which is the unit of the plant can be transformed at pleasure into every part, as bract, leaf, petal, stamen, pistil, or seed.
In geology, what a useful hint was given to the early inquirers on seeing in the possession of Professor Playfair a bough of a fossil tree which was perfect wood at one end and perfect mineral coal at the other. Natural objects, if individually described and out of connection, are not yet known, since they are really parts of a symmetrical universe, like words of a sentence; and if their true order is found, the poet can read their divine significance orderly as in a Bible. Each animal or vegetable form remembers the next inferior and predicts the next higher.
There is one animal, one plant, one matter, and one force. The laws of light and of heat translate each other;—so do the laws of sound and of color; and so galvanism, electricity, and magnetism are varied forms of the selfsame energy. While the student ponders this immense unity, he observes that all things in Nature, the animals, the mountain, the river, the seasons, wood, iron, stone, vapor, have a mysterious relation to his thoughts and his life; their growths, decays, quality and use so curiously resemble himself, in parts and in wholes, that he is compelled to speak by means of them. His words and his thoughts are framed by their help. Every noun is an image. Nature gives him, sometimes in a flattered likeness, sometimes in caricature, a copy of every humor and shade in his character and mind. The world is an immense picture-book of every passage in human life. Every object he beholds is the mask of a man.
“The privates of man's heartThey speken and sound in his earAs tho' they loud winds were;”for the universe is full of their echoes.
Every correspondence we observe in mind and matter suggests a substance older and deeper than either of these old nobilities. We see the law gleaming through, like the sense of a half-translated ode of Hafiz. The poet who plays with it with most boldness best justifies himself; is most profound and most devout. Passion adds eyes; is a magnifying-glass. Sonnets of lovers are mad enough, but are valuable to the philosopher, as are prayers of saints, for their potent symbolism.
Science was false by being unpoetical. It assumed to explain a reptile or mollusk, and isolated it,—which is hunting for life in graveyards. Reptile or mollusk or man or angel only exists in system, in relation. The metaphysician, the poet, only sees each animal form as an inevitable step in the path of the creating mind. The Indian, the hunter, the boy with his pets, have sweeter knowledge of these than the savant. We use semblances of logic until experience puts us in possession of real logic. The poet knows the missing link by the joy it gives. The poet gives us the eminent experiences only,—a god stepping from peak to peak, nor planting his foot but on a mountain.
Science does not know its debt to imagination. Goethe did not believe that a great naturalist could exist without this faculty. He was himself conscious of its help, which made him a prophet among the doctors. From this vision he gave brave hints to the zoölogist, the botanist, and the optician.
Poetry.—The primary use of a fact is low; the secondary use, as it is a figure or illustration of my thought, is the real worth.
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