For goodness' sake, all this dissecting! The poem is inspired and has enigmas and deliberate ambiguities, as do all good poems. Flippin' 'eck, we're supposed to be able to appreciate good art on multiple levels, aren't we?   The tune is lovely and atmospheric though it may not exactly fit the words if you want to get all technical. You song-techs are forgetting that we listeners are absorbing an overall picture, not sitting there analysing whether the song and tune, bar for bar, are some sort of perfect match. Luke's version is a solid gold classic, technically-flawed though it may be. In fact, the flaws probably contribute to its greatness. The poem expresses the many flaws of humanity-in-love, and the poet himself lays bare and laments his own imperfections. And Luke conveys this wonderfully. Humanity, right?