Ariel possesses that power of omnipresence and all those constantly varying forms which are the special gift of imagination. He skims along the foam, flies on the keen north wind, and burrows in the frozen earth. Now he is a fire spirit spreading terror as he flashes in cloven flame, encircling the mast and playing about the rigging of the vessel, or as one great bolt hurls himself to strike with all the power and speed of lightning. Now again, he is a mermaid, seen in fitful glimpses, and chanting alluring songs. He sounds the magic music of the air, he mimics the monotonous splashing of the waves, or barks like a dog and crows like a cock. In every essence of his nature as well as name he is a spirit of the air, a mirage, a hallucination of light and sound. He is a bird, a harpy, and finds his way through the darkness of night to fetch dew from the enchanted Bermudas. Faithful and zealous servant of the good, he terrifies, bewilders, and befools the wicked. He is compounded of charm and delicacy, and is as swift and bright as lightning.
He was formerly in the service of the witch Sycorax, but, incurring her displeasure, was imprisoned by her in the rift of a cloven pine. There he was held in suffering many years, until delivered at last by Prospero's supernatural powers. He serves the magician in return for his release, but never ceases to long for his promised freedom. Although a creature of the air, he is capable of compassion, and can understand a sentiment of devotion which he does not actually feel. His subject condition is painful to him, and he looks forward with joy to the hour of liberty. Spirit of fire and air as he is, his essence exhales itself in music and mischievous pranks.
Caliban, on the other hand, is of the earth earthy, a kind of land-fish, a being formed of heavy and gross materials, who was raised by Prospero from the condition of an animal to that of a human being, without, however, being really civilised. Prospero made much of the creature at first, caressed him and gave him to drink of water mixed with the juice of berries; taught him the art of speech and how to name the greater and the lesser light, and lodged him in his cell. But from the moment Caliban's savage instinct prompted him to attempt the violation of Miranda, Prospero treated him as a slave and made him serve as such. Strangely enough, however, Shakespeare has made him no prosaically raw being, untouched by the poetry of the enchanted island. The vulgar new-comers, Trinculo and Stephano, speak in prose, but Caliban's utterances are always rhythmic; indeed, many of the most exquisitely melodious lines in the play fall from the lips of this poor animal. They sound like an echo from the time he lived within the magic circle and was the constant companion of Prospero and Miranda.
But since, from being their fellow, he has been degraded to their slave, all gratitude for former benefits has disappeared from his mind; and he now employs the language they have taught him in cursing the master who has robbed him, the original inhabitant, of his birthright. His is the hatred of the savage for his civilised conquerors.
We have seen that the abhorrence Shakespeare felt for the vices of the court and fashionable life inclined him during these later years to dream of some natural life far from all civilisation (Cymbeline). But his instinct was too sure and his judgment too sound to allow of his ever believing, with the Utopists of his day, that the natural primitive state of man was one of innocence and nobility of soul in the golden age of prehistoric times. Caliban is a protest against this very theory, and Shakespeare distinctly ridicules all such fanaticism in the lines copied from Montaigne, and placed in Gonzalo's mouth, concerning the organisation of an ideal commonwealth; without commerce, law, or letters, without riches or poverty, without corn, oil, or wine, and without work of any kind, but a happy idleness for all.
Caliban represents the primitive, the prehistoric man; yet, such as he is, a poetically inclined philosopher of our day has discovered in him the features of the eternal plebeian. It is instructive to witness with how few reservations Renan was enabled to modernise the type, and shown how, tidied up and washed and interpreted as the dull fickle democracy, Caliban was as capable as the old aristocratic-religious despotism of sounding a conservative note, of protecting the arts and graciously patronising the sciences, &c.
Shakespeare's Caliban was the offspring of Sycorax and begotten by the Devil himself. With such a pedigree he could hardly be expected to rise to any height of angelic goodness and purity. He is, in reality, more of an elemental power than a human being; and therefore rouses neither indignation nor contempt in the mind of the audience, but genuine amusement. Invented, and drawn with masterly humour, he represents the savage natives found by the English in America, upon whom they bestowed the blessings of civilisation in the form of strong drink. There is not only wit but profound significance in the scene (Act ii. sc. 2) in which Caliban, who at first takes Trinculo and Stephano for two spirits sent by Prospero to torment him, allows himself to be persuaded that Trinculo is the Man in the Moon, shown to him by Miranda on beautiful moonlight nights, and forthwith worships him as his god, because he alone possesses the bottle with the heavenly liquor which has been put to the creature's lips, and given him his first taste of the wonderful intoxication produced by fire-water.
Midway between these symbols of the highest culture and of Nature in its crudest form Shakespeare has placed a young girl, as noble in body and soul as her father, and yet so purely and simply a child of Nature that she unhesitatingly follows her instincts, including that of love. She is the counterpart of the masculine ideal in Prospero, being all that is admirable in woman; hence her name, Miranda. To preserve her absolutely unspotted and fresh, Shakespeare has made her almost as young as his Juliet; and to still further accentuate the impression of maidenly immaculateness, she has grown up without seeing a single youth of the other sex, a trait which was used and abused by the Spaniards later in the same century. Hence the wondering admiration of the first meeting between Ferdinand and Miranda:
"What! is't a spirit?
Lord, how it looks about! Believe me, sir,
It carries a brave form. But 'tis a spirit."
When her father denies this she says: