The plan of “Paradise Lost” has this inconvenience, that it comprises neither human actions nor human manners. The man and woman who act and suffer are in a state which no other man or woman can ever know. The reader finds no transaction in which he can be engaged—beholds no condition in which he can by any effort of imagination place himself; he has, therefore, little natural curiosity or sympathy.

We all, indeed, feel the effects of Adam’s disobedience; we all sin like Adam, and like him must all bewail our offences; we have restless and insidious enemies in the fallen angels, and in the blessed spirits we have guardians and friends; in the redemption of mankind we hope to be included; in the description of heaven and hell we are surely interested, as we are all to reside hereafter either in the regions of horror or bliss.

But these truths are too important to be new; they have been taught to our infancy; they have mingled with our solitary thoughts and familiar conversations, and are habitually interwoven with the whole texture of life. Being therefore not new, they raise no unaccustomed emotion in the mind; what we knew before, we cannot learn; what is not unexpected, cannot surprise.

Of the ideas suggested by these awful scenes, from some we recede with reverence, except when stated hours require their association; and from others we shrink with horror, or admit them only as salutary inflictions, as counterpoises to our interests and passions. Such images rather obstruct the career of fancy than incite it.

Pleasure and terror are indeed the genuine sources of poetry; but poetical pleasure must be such as human imagination can at least conceive, and poetical terrors such as human strength and fortitude may combat. The good and evil of eternity are too ponderous for the wings of wit; the mind sinks under them in passive helplessness, content with calm belief and humble adoration.

Known truths, however, may take a different appearance, and be conveyed to the mind by a new train of intermediate images. This Milton has undertaken and performed with pregnancy and vigour of mind peculiar to himself. Whoever considers the few radical positions which the Scriptures afforded him, will wonder by what energetic operation he expanded them to such extent, and ramified them to so much variety, restrained as he was by religious reverence from licentiousness of fiction.

Here is a full display of the united force of study and genius—of a great accumulation of materials, with judgment to digest and fancy to combine them: Milton was able to select from nature or from story, from an ancient fable or from modern science, whatever could illustrate or adorn his thoughts. An accumulation of knowledge impregnated his mind, fermented by study and exalted by imagination.

It has been therefore said, without an indecent hyperbole, by one of his encomiasts, that in reading “Paradise Lost” we read a book of universal knowledge.

But original deficiency cannot be supplied. The want of human interest is always felt. “Paradise Lost” is one of the books which the reader admires and lays down, and forgets to take up again. None ever wished it longer than it is. Its perusal is a duty rather than a pleasure. We read Milton for instruction, retire harassed and overburdened, and look elsewhere for recreation; we desert our master, and seek for companions.

Another inconvenience of Milton’s design is, that it requires the description of what cannot be described, the agency of spirits. He saw that immateriality supplied no images, and that he could not show angels acting but by instruments of action; he therefore invested them with form and matter. This, being necessary, was therefore defensible; and he should have secured the consistency of his system, by keeping immateriality out of sight, and enticing his reader to drop it from his thoughts. But he has unhappily perplexed his poetry with his philosophy. His infernal and celestial powers are sometimes pure spirit, and sometimes animated body. When Satan walks with his lance upon the “burning marl,” he has a body; when, in his passage between hell and the new world, he is in danger of sinking in the vacuity, and is supported by a gust of rising vapours, he has a body; when he animates the toad, he seems to be more spirit, that can penetrate matter at pleasure; when he “starts up in his own shape,” he has at least a determined form; and when he is brought before Gabriel, he has “a spear and a shield,” which he had the power of hiding in the toad, though the arms of the contending angels are evidently material.