A glance at the history of European poetry is enough to inform us that rhyme itself is not indispensable. Latin poetry in the classical age had no use for it, and the kind of Latin poetry that does rhyme - as for instance the medieval Carmina Burana - tends to be somewhat crude stuff in comparison with the classical verse that doesn't.
James Fenton"Love" is so short of perfect rhymes that convention allows half-rhymes like "move". The alternative is a plague of doves, or a kind of poem in which the poet addresses his adored both as "love" and as "guv" - a perfectly decent solution once, but only once, in a while.
James FentonWhat happened to poetry in the twentieth century was that it began to be written for the page.
James FentonThe voice is raised, and that is where poetry begins. And even today, in the prolonged aftermath of modernism, in places where "open form" or free verse is the orthodoxy, you will find a memory of that raising of the voice in the term "heightened speech".
James FentonFor poets today or in any age, the choice is not between freedom on the one hand and abstruse French forms on the other. The choice is between the nullity and vanity of our first efforts, and the developing of a sense of idiom, form, structure, metre, rhythm, line - all the fundamental characteristics of this verbal art.
James Fenton