To this objection the answer has been supplied by De Quincey. To Milton the personages of the heathen Pantheon were not merely familiar fictions or established poetical properties; they were evil spirits. That they were so was the creed of the early interpreters. In their demonology, the Hebrew and the Greek poets had a common ground. Up to the advent of Christ, the fallen angels had been permitted to delude mankind. To Milton, as to Jerome, Moloch was Mars, and Chemosh Priapus. Plato knew of hell as Tartarus, and the battle of the giants in Hesiod is no fiction, but an obscured tradition of the war once waged in heaven. What has been adverse to Milton's art of illusion is, that the belief that the gods of the heathen world were the rebellious angels has ceased to be part of the common creed of Christendom. Milton was nearly the last of our great writers who was fully possessed of the doctrine. His readers now no longer share it with the poet. In Addison's time (1712) some of the imaginary persons in _Paradise Lost_ were beginning to make greater demands upon the faith of readers, than those cool rationalistic times could meet.
There is an element of decay and death in poems which we vainly style immortal. Some of the sources of Milton's power are already in process of drying up. I do not speak of the ordinary caducity of language, in virtue of which every effusion of the human spirit is lodged in a body of death. Milton suffers little as yet from this cause. There are few lines in his poems which are less intelligible now, than they were at the time they were written. This is partly to be ascribed to his limited vocabulary, Milton, in his verse, using not more than eight thousand words, or about half the number used by Shakespeare. Nay, the position of our earlier writers has been improved by the mere spread of the English language over a wider area. Addison apologised for _Paradise Lost_ falling short of the _Aeneid_, because of the inferiority of the language in which it was written. "So divine a poem in English is like a stately palace built of brick." The defects of English for purposes of rhythm and harmony are as great now as they ever were, but the space that our speech fills in the world is vastly increased, and this increase of consideration is reflected back upon our older writers.