A wonderful quote from the long poem "Endymion" by John Keats:

O magic sleep! O comfortable bird,
That broodest o'er the troubled sea of the mind
Till it is hush'd and smooth! O unconfin'd
Restraint! imprisoned liberty! great key
To golden palaces, strange minstrelsy,
Fountains grotesque, new trees, bespangled caves,
Echoing grottos, full of tumbling waves

And moonlight; aye, to all the mazy world

460

Of silvery enchantment!--who, upfurl'd
Beneath thy drowsy wing a triple hour,
But renovates and lives?