[F]or spirits when they please—John Milton, Paradise Lost, 1674
Can either sex assume, or both; so soft
And uncompounded is their essence pure,
Not tied or manacled with joint or limb,
Nor founded on the brittle strength of bones,
Like cumbrous flesh; but in what shape they choose
Dilated or condensed, bright or obscure
Can execute their airy purposes
And works of love or enmity fulfil.