Contrariwise

Forlorn! the very word is like a bell
To toil me back from thee to my sole self!
Adieu! the fancy cannot cheat so well
As she is fam’d to do, deceiving elf.
Adieu! adieu! thy plaintive anthem fades
Past the near meadows, over the still stream,
Up the hill-side; and now ‘tis buried deep
In the next valley-glades:
Was it a vision, or a waking dream?
Fled is that music:—Do I wake or sleep?

—John Keats (part 8, Ode to a Nightingale)