As Keats says, "A thing of beauty is a joy for ever, its loveliness increases."
The song celebrates the loveliness of springtime.
From this magical opening the work radiates out into passages of almost unfathomable loveliness.
After the momentary premonition of a faster tempo, still unrealized, refracted oboe and clarinet lines once more hint at some unrevealed loveliness.
Nature is lovely, and rejoices in her loveliness.