The use and end of poetry, "both at the first and now, was and is to hold the mirror up to Nature," seen through the medium of passion and imagination, not divested of that medium by means of literal truth or abstract reason. Those who would dispel the illusions of imagination, to give us their drab-coloured creation in their stead, are not very wise. It cannot be concealed, however, that the progress of knowledge and refinement has a tendency to clip the wings of poetry. The province of the imagination is principally visionary, the unknown and undefined; we can only fancy what we do not know. There can never be another Jacob's dream. Since that time the heavens have gone farther off, and grown astronomical.
Poetry combines the ordinary use of language with musical expression. As there are certain sounds that excite certain movements, and the song and dance go together, so there are, no doubt, certain thoughts that lead to certain tones of voice, or modulations of sound. The jerks, the breaks, the inequalities and harshnesses of prose are fatal to the flow of a poetical imagination, as a jolting road disturbs the reverie of an absent-minded man. But poetry makes these odds all even. The musical in sound is the sustained and continuous; the musical in thought is the sustained and continuous also. An excuse may be made for rhyme in the same manner.
These are two out of the four greatest English poets; but they were both much indebted to the early poets of Italy, and may be considered as belonging, in some degree, to that school. Spenser delighted in luxurious enjoyment; Chaucer in severe activity of mind. Spenser was the most romantic and visionary of all great poets; Chaucer the most practical, the most a man of business and the world.
Chaucer does not affect to show his power over the reader's mind, but the power which his subject has over his own. The readers of Chaucer's poetry feel more nearly what the persons he describes must have felt, than perhaps those of any other poet. There is no artificial, pompous display; but a strict parsimony of the poet's materials, like the rude simplicity of the age in which he lived. His words point as an index to the objects, like the eye or finger. There were none of the commonplaces of poetic diction in his time, no reflected lights of fancy, no borrowed roseate tints; he was obliged to inspect things narrowly for himself, so that his descriptions produce the effect of sculpture.