I plung'd for life or death. To interknit
One's senses with so dense a breathing stuff
Might seem a work of pain; so not enough
Can I admire how crystal-smooth it felt,
And buoyant round my limbs. At first I dwelt
Whole days and days in sheer astonishment;
Forgetful utterly of self-intent;
Moving but with the mighty ebb and flow.
Then, like a new fledg'd bird that first doth shew
His spreaded feathers to the morrow chill,
I tried in fear the pinions of my will.
'Twas freedom! and at once I visited
The ceaseless wonders of this ocean-bed.

Glaucus on entering the sea and breathing water, Keat's ENDYMION (line 380)