Lovers of the ideal who thus hastily believe in its reality are called idealists, and Shelley was an idealist in almost every sense of that hard-used word. He early became an idealist after Berkeley's fashion, in that he discredited the existence of matter and embraced a psychological or (as it was called) intellectual system of the universe. In his drama Hellas he puts this view with evident approval into the mouth of Ahasuerus:

"This whole
Of suns and worlds and men and beasts and flowers,
With all the silent or tempestuous workings
By which they have been, are, or cease to be,
Is but a vision;—all that it inherits
Are motes of a sick eye, bubbles and dreams.
Thought is its cradle and its grave; nor less
The future and the past are idle shadows
Of thought's eternal flight—they have no being:
Nought is but that which feels itself to be."

But Shelley was even more deeply and constantly an idealist after the manner of Plato; for he regarded the good as a magnet (inexplicably not working for the moment) that draws all life and motion after it; and he looked on the types and ideals of things as on eternal realities that subsist, beautiful and untarnished, when the glimmerings that reveal them to our senses have died away. From the infinite potentialities of beauty in the abstract, articulate mind draws certain bright forms—the Platonic ideas—"the gathered rays which are reality," as Shelley called them: and it is the light of these ideals cast on objects of sense that lends to these objects some degree of reality and value, making out of them "lovely apparitions, dim at first, then radiant ... the progeny immortal of painting, sculpture, and rapt poesy."

The only kind of idealism that Shelley had nothing to do with is the kind that prevails in some universities, that Hegelian idealism which teaches that perfect good is a vicious abstraction, and maintains that all the evil that has been, is, and ever shall be is indispensable to make the universe as good as it possibly could be. In this form, idealism is simply contempt for all ideals, and a hearty adoration of things as they are; and as such it appeals mightily to the powers that be, in church and in state; but in that capacity it would have been as hateful to Shelley as the powers that be always were, and as the philosophy was that flattered them. For his moral feeling was based on suffering and horror at what is actual, no less than on love of a visioned good. His conscience was, to a most unusual degree, at once elevated and sincere. It was inspired in equal measure by prophecy and by indignation. He was carried away in turn by enthusiasm for what his ethereal and fertile fancy pictured as possible, and by detestation of the reality forced upon him instead. Hence that extraordinary moral fervour which is the soul of his poetry. His imagination is no playful undirected kaleidoscope; the images, often so tenuous and metaphysical, that crowd upon him, are all sparks thrown off at white heat, embodiments of a fervent, definite, unswerving inspiration. If we think that the Cloud or the West Wind or the Witch of the Atlas are mere fireworks, poetic dust, a sort of bataille des fleurs in which we are pelted by a shower of images—we have not understood the passion that overflows in them, as any long-nursed passion may, in any of us, suddenly overflow in an unwonted profusion of words. This is a point at which Francis Thompson's understanding of Shelley, generally so perfect, seems to me to go astray. The universe, Thompson tells us, was Shelley's box of toys. "He gets between the feet of the horses of the sun. He stands in the lap of patient Nature, and twines her loosened tresses after a hundred wilful fashions, to see how she will look nicest in his song." This last is not, I think, Shelley's motive; it is not the truth about the spring of his genius. He undoubtedly shatters the world to bits, but only to build it nearer to the heart's desire, only to make out of its coloured fragments some more Elysian home for love, or some more dazzling symbol for that infinite beauty which is the need—the profound, aching, imperative need—of the human soul. This recreative impulse of the poet's is not wilful, as Thompson calls it: it is moral. Like the Sensitive Plant

"It loves even like Love,—its deep heart is full;
It desires what it has not, the beautiful."

The question for Shelley is not at all what will look nicest in his song; that is the preoccupation of mincing rhymesters, whose well is soon dry. Shelley's abundance has a more generous source; it springs from his passion for picturing what would be best, not in the picture, but in the world. Hence, when he feels he has pictured or divined it, he can exclaim:

"The joy, the triumph, the delight, the madness,
The boundless, overflowing, bursting gladness,
The vaporous exultation, not to be confined!
Ha! Ha! the animation of delight,
Which wraps me like an atmosphere of light,
And bears me as a cloud is borne by its own wind!"

To match this gift of bodying forth the ideal Shelley had his vehement sense of wrong; and as he seized upon and recast all images of beauty, to make them more perfectly beautiful, so, to vent his infinite horror of evil, he seized on all the worst images of crime or torture that he could find, and recast them so as to reach the quintessence of distilled badness. His pictures of war, famine, lust, and cruelty are, or seem, forced, although perhaps, as in the Cenci, he might urge that he had historical warrant for his descriptions, far better historical warrant, no doubt, than the beauty and happiness actually to be found in the world could give him for his Skylark, his Epipsychidion, or his Prometheus. But to exaggerate good is to vivify, to enhance our sense of moral coherence and beautiful naturalness; it is to render things more graceful, intelligible, and congenial to the spirit which they ought to serve. To aggravate evil, on the contrary, is to darken counsel—already dark enough—and the want of truth to nature in this pessimistic sort of exaggeration is not compensated for by any advantage. The violence and, to my feeling, the wantonness of these invectives—for they are invectives in intention and in effect—may have seemed justified to Shelley by his political purpose. He was thirsting to destroy kings, priests, soldiers, parents, and heads of colleges—to destroy them, I mean, in their official capacity; and the exhibition of their vileness in all its diabolical purity might serve to remove scruples in the half-hearted. We, whom the nineteenth century has left so tender to historical rights and historical beauties, may wonder that a poet, an impassioned lover of the beautiful, could have been such a leveller, and such a vandal in his theoretical destructiveness. But here the legacy of the eighteenth century was speaking in Shelley, as that of the nineteenth is speaking in us: and moreover, in his own person, the very fertility of imagination could be a cause of blindness to the past and its contingent sanctities. Shelley was not left standing aghast, like a Philistine, before the threatened destruction of all traditional order. He had, and knew he had, the seeds of a far lovelier order in his own soul; there he found the plan or memory of a perfect commonwealth of nature ready to rise at once on the ruins of this sad world, and to make regret for it impossible.

So much for what I take to be the double foundation of Shelley's genius, a vivid love of ideal good on the one hand, and on the other, what is complementary to that vivid love, much suffering and horror at the touch of actual evils. On this double foundation he based an opinion which had the greatest influence on his poetry, not merely on the subject-matter of it, but also on the exuberance and urgency of emotion which suffuses it. This opinion was that all that caused suffering and horror in the world could be readily destroyed: it was the belief in perfectibility. An animal that has rigid instincts and an a priori mind is probably very imperfectly adapted to the world he comes into: his organs cannot be moulded by experience and use; unless they are fitted by some miraculous pre-established harmony, or by natural selection, to things as they are, they will never be reconciled with them, and an eternal war will ensue between what the animal needs, loves, and can understand and what the outer reality offers. So long as such a creature lives—and his life will be difficult and short—events will continually disconcert and puzzle him; everything will seem to him unaccountable, inexplicable, unnatural. He will not be able to conceive the real order and connection of things sympathetically, by assimilating his habits of thought to their habits of evolution. His faculties being innate and unadaptable will not allow him to correct his presumptions and axioms; he will never be able to make nature the standard of naturalness. What contradicts his private impulses will seem to him to contradict reason, beauty, and necessity. In this paradoxical situation he will probably take refuge in the conviction that what he finds to exist is an illusion, or at least not a fair sample of reality. Being so perverse, absurd, and repugnant, the given state of things must be, he will say, only accidental and temporary. He will be sure that his own a priori imagination is the mirror of all the eternal proprieties, and that as his mind can move only in one predetermined way, things cannot be prevented from moving in that same way save by some strange violence done to their nature. It would be easy, therefore, to set everything right again: nay, everything must be on the point of righting itself spontaneously. Wrong, of its very essence, must be in unstable equilibrium. The conflict between what such a man feels ought to exist and what he finds actually existing must, he will feel sure, end by a speedy revolution in things, and by the removal of all scandals; that it should end by the speedy removal of his own person, or by such a revolution in his demands as might reconcile him to existence, will never occur to him; or, if the thought occurs to him, it will seem too horrible to be true.

Such a creature cannot adapt himself to things by education, and consequently he cannot adapt things to himself by industry. His choice lies absolutely between victory and martyrdom. But at the very moment of martyrdom, martyrs, as is well known, usually feel assured of victory. The a priori spirit will therefore be always a prophet of victory, so long as it subsists at all. The vision of a better world at hand absorbed the Israelites in exile, St. John the Baptist in the desert, and Christ on the cross. The martyred spirit always says to the world it leaves, "This day thou shall be with me in paradise."