hard to beat Yeats
Ode to a Nightingale
By John Keats
My heart aches, and a drowsy numbness pains
         My sense, as though of hemlock I had drunk,
Or emptied some dull opiate to the drains
         One minute past, and Lethe-wards had sunk:
'Tis not through envy of thy happy lot,
         But being too happy in thine happiness,—
                That thou, light-winged Dryad of the trees
                        In some melodious plot
         Of beechen green, and shadows numberless,
                Singest of summer in full-throated ease.
O, for a draught of vintage! that hath been
         Cool'd a long age in the deep-delved earth,
Tasting of Flora and the country green,
         Dance, and Provençal song, and sunburnt mirth!
O for a beaker full of the warm South,
         Full of the true, the blushful Hippocrene,
                With beaded bubbles winking at the brim,
                        And purple-stained mouth;
         That I might drink, and leave the world unseen,
                And with thee fade away into the forest dim:
Fade far away, dissolve, and quite forget
         What thou among the leaves hast never known,