No More Learning

What thoughts had sway o'er Cythna's lonely slumber
That night, I know not; but my own did seem
As if they might ten thousand years           _1110
Of waking life, the visions of a dream
Which hid in one dim gulf the troubled stream
Of mind; a boundless chaos wild and vast,
Whose limits yet were never memory's theme:
And I lay struggling as its whirlwinds passed, _1115
Sometimes for rapture sick, sometimes for pain aghast.