A poem with grandly conceived and executed stanzas, such as one of Keats's odes, should be like an enfilade of rooms in a palace: one proceeds, with eager anticipation, from room to room.

Composers need words, but they do not necessarily need poetry. The Russian composer, Aleksandr Mossolov, who chose texts from newspaper small ads, had a good point to make. With revolutionary music, any text can be set to work.

In rap, as in most popular lyrics, a very low standard is set for rhyme; but this was not always the case with popular music.

At four lines, with the quatrain, we reach the basic stanza form familiar from a whole range of English poetic practice. This is the length of the ballad stanza, the verse of a hymn, and innumerable other kinds of verse.

The basic rhymes in English are masculine, which is to say that the last syllable of the line is stressed: "lane" rhymes with "pain", but it also rhymes with "urbane" since the last syllable of "urbane" is stressed. "Lane" does not rhyme with "methane".

An aria in an opera - Handel's 'Ombra mai fu,' for example - gets along with an incredibly small number of words and ideas and a large amount of variation and repetition. That's the beauty of it. It's not taxing to the listener's intelligence because if you haven't heard it the first time round, it'll come around again.

Modernism in other arts brought extreme difficulty. In poetry, the characteristic difficulty imported under the name of modernism was obscurity. But obscurity could just as easily be a quality of metrical as of free verse.