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.
The whole objection, however, of the immorality of poetry rests upon a misconception of the manner in which poetry acts to produce the moral improvement of man. Ethical science arranges the elements which poetry has created, and propounds schemes and proposes examples of civil and domestic life: nor is it for want of admirable doctrines that men hate, and despise, and censure, and deceive, and subjugate one another. But poetry acts in another and diviner manner. It awakens and enlarges the mind itself by rendering it the receptacle of a thousand unapprehended combinations of thought. Poetry lifts the veil from the hidden beauty of the world, and makes familiar objects be as if they were not familiar; it reproduces all that it represents, and the impersonations clothed in its Elysian light stand thenceforward in the minds of those who have once contemplated them, as memorials of that gentle and exalted content which extends itself over all thoughts and actions with which it coexists. The great secret of morals is love; or a going out of our nature, and an identification of ourselves with the beautiful which exists in thought, action, or person, not our own. A man, to be greatly good, must imagine intensely and comprehensively; he must put himself in the place of another and of many others; the pains and pleasure of his species must become his own. The great instrument of moral good is the imagination; and poetry administers to the effect by acting upon the cause. Poetry enlarges the circumference of the imagination by replenishing it with thoughts of ever new delight, which have the power of attracting and assimilating to their own nature all other thoughts, and which form new intervals and interstices whose void forever craves fresh food. Poetry strengthens the faculty which is the organ of the moral nature of man, in the same manner as exercise strengthens a limb. A poet therefore would do ill to embody his own conceptions of right and wrong, which are usually those of his place and time, in his poetical creations, which participate in neither. By this assumption of the inferior office of interpreting the effect, in which perhaps after all he might acquit himself but imperfectly, he would resign a glory in a participation in the cause. There was little danger that Homer, or any of the eternal poets, should have so far misunderstood themselves as to have abdicated this throne of their widest dominion. Those in whom the poetical faculty, though great, is less intense, as Euripides, Lucan, Tasso, Spenser, have frequently affected a moral aim, and the effect of their poetry is diminished in exact proportion to the degree in which they compel us to advert to this purpose.