Milton first published his seminal epic poem, Paradise Lost, in 1667. A “Revised and Augmented” version, which is the one read more widely today, was published in 1674, with this following introduction. In it, Milton explains why he has chosen to compose his long poem in English heroic verse without the use of rhyme, following the models of Homer and Virgil. Milton argues that rhyme is particularly unnecessary in longer poems, and that its unquestioned use by his peers, “carried away by Custom, but much to their own vexation, hindrance, and constraint to express many things otherwise, and for the most part worst than they would have exprest them.” Milton sees an inflexible application of rhyme and meter as in danger of becoming rote and mathematical, and he defends the liberty he found in releasing his poem from rhyme’s limitations.
The Measure is English Heroic Verse without Rime, as that of Homer in Greek, and Virgil in Latin; Rhime being no necessary Adjunct or true Ornament of Poem or good Verse, in longer Works especially, but the Invention of a barbarous Age, to set off wretched matter and lame Meeter; grac't indeed since by the use of some famous modern Poets, carried away by Custom, but much to thir own vexation, hindrance, and constraint to express many things otherwise, and for the most part worse then else they would have exprest them. Not without cause therefore some both Italian, and Spanish Poets of prime note have rejected Rhime both in longer and shorter Works, as have also long since our best English Tragedies, as a thing of itself, to all judicious ears, triveal, and of no true musical delight; which consists onely in apt Numbers, fit quantity of Syllables, and the sense variously drawn out from one Verse into another, not in the jingling sound of like endings, a fault avoyded by the learned Ancients both in Poetry and all good Oratory. This neglect then of Rhime so little is to be taken for a defect, though it may seem so perhaps to vulgar Readers, that it rather is to be esteem'd an example set, the first in English, of ancient liberty recover'd to heroic Poem from the troublesom and modern bondage of Rimeing.