A poem is the very image of life expressed in its eternal truth. There is this difference between a story and a poem, that a story is a catalogue of detached facts, which have no other connection than time, place, circumstance, cause and effect; the other is the creation of actions according to the unchangeable forms of human nature, as existing in the mind of the Creator, which is itself the image of all other minds. The one is partial, and applies only to a definite period of time, and a certain combination of events which can never again recur; the other is universal, and contains within itself the germ of a relation to whatever motives or actions have place in the possible varieties of human nature. Time, which destroys the beauty and the use of the story of particular facts, stripped of the poetry which should invest them, augments that of poetry, and forever develops new and wonderful applications of the eternal truth which it contains. Hence epitomes have been called the moths of just history; they eat out the poetry of it. A story of particular facts is as a mirror which obscures and distorts that which should be beautiful; poetry is a mirror which makes beautiful that which is distorted.
The parts of a composition may be poetical, without the composition as a whole being a poem. A single sentence may be considered as a whole, though it may be found in the midst of a series of unassimilated portions; a single word even may be a spark of inextinguishable thought. And thus all the great historians, Herodotus, Plutarch, Livy, were poets; and although the plan of these writers, especially that of Livy, restrained them from developing this faculty in its highest degree, they made copious and ample amends for their subjection, by filling all the interstices of their subjects with living images.
Having determined what is poetry, and who are poets, let us proceed to estimate its effects upon society.
Poetry is ever accompanied with pleasure: all spirits on which it falls open themselves to receive the wisdom which is mingled with its delight. In the infancy of the world, neither poets themselves nor their auditors are fully aware of the excellence of poetry: for it acts in a divine and unapprehended manner, beyond and above consciousness; and it is reserved for future generations to contemplate and measure the mighty cause and effect in all the strength and splendor of their union. Even in modern times, no living poet ever arrived at the fulness of his fame; the jury which sits in judgment upon a poet, belonging as he does to all time, must be composed of his peers: it must be impanelled by Time from the selectest of the wise of many generations. A poet is a nightingale, who sits in darkness and sings to cheer its own solitude with sweet sounds; his auditors are as men entranced by the melody of an unseen musician, who feel that they are moved and softened, yet know not whence or why. The poems of Homer and his contemporaries were the delight of infant Greece; they were the elements of that social system which is the column upon which all succeeding civilization has reposed. Homer embodied the ideal perfection of his age in human character; nor can we doubt that those who read his verses were awakened to an ambition of becoming like to Achilles, Hector, and Ulysses: the truth and beauty of friendship, patriotism, and persevering devotion to an object, were unveiled to the depths in these immortal creations: the sentiments of the auditors must have been refined and enlarged by a sympathy with such great and lovely impersonations, until from admiring they imitated, and from imitation they identified themselves with the objects of their admiration. Nor let it be objected that these characters are remote from moral perfection, and that they can by no means be considered as edifying patterns for general imitation. Every epoch, under names more or less specious, has deified its peculiar errors; Revenge is the naked idol of the worship of a semi-barbarous age: and Self-deceit is the veiled image of unknown evil, before which luxury and satiety lie prostrate. But a poet considers the vices of his contemporaries as the temporary dress in which his creations must be arrayed, and which cover without concealing the eternal proportions of their beauty. An epic or dramatic personage is understood to wear them around his soul, as he may the ancient armor or the modern uniform around his body; whilst it is easy to conceive a dress more graceful than either. The beauty of the internal nature cannot be so far concealed by its accidental vesture, but that the spirit of its form shall communicate itself to the very disguise, and indicate the shape it hides from the manner in which it is worn. A majestic form and graceful motions will express themselves through the most barbarous and tasteless costume. Few poets of the highest class have chosen to exhibit the beauty of their conceptions in its naked truth and splendor; and it is doubtful whether the alloy of costume, habit, etc., be not necessary to temper this planetary music for mortal ears.