But else, in deep of night, when drowsiness
Hath locked up mortal sense, then listen I
To [the celestial Sirens’ harmony],
That sit upon [the nine infolded spheres],
[And sing to those that hold the vital shears], 65
And turn the adamantine spindle round
On which the fate of gods and men is wound.
Such sweet compulsion doth in music lie,
To lull [the daughters of Necessity],
And keep unsteady Nature to her law, 70