No two such consecutive lines were ever written by Milton. His verse, even in its least admirable passages, does not sing, nor trip with regular alternate stress; its movement suggests neither dance nor song, but rather the advancing march of a body of troops skilfully handled, with incessant changes in their disposition as they pass over broken ground. He can furnish them with wings when it so pleases him. No analysis of his prosody can explain the wonders of his workmanship. But it is not idle to ask for a close attention to the scansion of lines like these, wherein he describes the upward progress of the Son of God and his escort after the Creation:-- The heavens and all the constellations rung, The planets in their station listening stood, While the bright pomp ascended jubilant. In the last line the first four words marshal the great procession in solid array; the last two lift it high into the empyrean. Let any one attempt to get the same upward effect with a stress, however light, laid on the last syllable of the line, or with words of fewer than three syllables apiece, and he will have to confess that, however abstruse the rules of its working may be, there is virtue in metrical cunning. The passage in the Seventh Book from which these lines are quoted would justify an entire treatise. The five regular alternate stresses first occur in a line describing the progress over the wide plain of Heaven:-- He through Heaven, That opened wide her blazing portals, led To God's eternal house direct the way. But, indeed, the examination of the music of Milton involves so minute a survey of technical detail as to be tedious to all but a few lovers of theory. The laws of music in verse are very subtle, and, it must be added, very imperfectly ascertained; so that those who dogmatise on them generally end by slipping into fantasy or pedantry. How carefully and incessantly Milton adjusted the sound to the sense is known to every reader of _Paradise Lost_. The dullest ear is caught by the contrast between the opening of the gates of Heaven-- Heaven opened wide Her ever-during gates, harmonious sound On golden hinges moving-- and the opening of those other gates-- On a sudden open fly, With impetuous recoil and jarring sound, The infernal doors, and on their hinges grate Harsh thunder, that the lowest bottom shook Of Erebus.