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The word nature has many senses; but if we preserve the one which etymology justifies, and which is the most philosophical as well, nature should mean the principle of birth or genesis, the universal mother, the great cause, or system of causes, that brings phenomena to light. If we take the word nature in this sense, it may be said that Lucretius, more than any other man, is the poet of nature. Of course, being an ancient, he is not particularly a poet of landscape. He runs deeper than that; he is a poet of the source of landscape, a poet of matter. A poet of landscape might try to suggest, by well-chosen words, the sensations of light, movement, and form which nature arouses in us; but in this attempt he would encounter the insuperable difficulty which Lessing long ago pointed out, and warned poets of: I mean the unfitness of language to render what is spatial and material; its fitness to render only what, like language itself, is bodiless and flowing,—action, feeling, and thought.
It is noticeable, accordingly, that poets who are fascinated by pure sense and seek to write poems about it are called not impressionists, but symbolists; for in trying to render some absolute sensation they render rather the field of association in which that sensation lies, or the emotions and half-thoughts that shoot and play about it in their fancy. They become—against their will, perhaps—psychological poets, ringers of mental chimes, and listeners for the chance overtones of consciousness. Hence we call them symbolists, mixing perhaps some shade of disparagement in the term, as if they were symbolists of an empty, super-subtle, or fatuous sort. For they play with things luxuriously, making them symbols for their thoughts, instead of mending their thoughts intelligently, to render them symbols for things.
A poet might be a symbolist in another sense,—if he broke up nature, the object suggested by landscape to the mind, and reverted to the elements of landscape, not in order to associate these sensations lazily together, but in order to build out of them in fancy a different nature, a better world, than that which they reveal to reason. The elements of landscape, chosen, emphasized, and recombined for this purpose, would then be symbols for the ideal world they were made to suggest, and for the ideal life that might be led in that paradise. Shelley is a symbolic landscape poet in this sense. To Shelley, as Francis Thompson has said, nature was a toy-shop; his fancy took the materials of the landscape and wove them into a gossamer world, a bright ethereal habitation for new-born irresponsible spirits. Shelley was the musician of landscape; he traced out its unrealized suggestions; transformed the things he saw into the things he would fain have seen. In this idealization it was spirit that guided him, the bent of his wild and exquisite imagination, and he fancied sometimes that the grosser landscapes of earth were likewise the work of some half-spiritual stress, of some restlessly dreaming power. In this sense, earthly landscape seemed to him the symbol of the earth spirit, as the starlit crystal landscapes of his verse, with their pensive flowers, were symbols in which his own fevered spirit was expressed, images in which his passion rested.
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