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 FentonGenerally speaking, rhyme is the marker for the end of a line. The first rhyme-word is like a challenge thrown down, which the poem itself has to respond to.
James FentonImitation, if it is not forgery, is a fine thing. It stems from a generous impulse, and a realistic sense of what can and cannot be done.
James FentonI don't see that a single line can constitute a stanza, although it can constitute a whole poem.
James Fenton