twin compasses are two

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He took the golden compasses, prepared
In God’s eternal store, to circumscribe
This universe, and all created things:
One foot he centered, and the other turned
Round through the vast profundity obscure;
And said, Thus far extend, thus far thy bounds,
This be thy just circumference, O world,
Thus God the Heaven created, thus the earth,
Matter unformed and void: Darkness profound
Covered the abyss: but on the watery calm
His brooding wings the spirit of God outspread,
And vital virtue infused, and vital warmth
Throughout the fluid mass; but downward purged
The black tartareous cold infernal dregs,
Adverse to life: then founded, then conglobed
Like things to like; the rest to several place
Disparted, and between spun out the air;
And earth self-balanced on her center hung.

–Paradise Lost, Book VII, lines 225-242

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Dull sublunary lovers’ love
(Whose soul is sense) cannot admit
Absence, because it doth remove
Those things which elemented it.

But we by a love so much refined,
That our selves know not what it is,
Inter-assured of the mind,
Care less, eyes, lips, and hands to miss.

Our two souls therefore, which are one,
Though I must go, endure not yet
A breach, but an expansion,
Like gold to airy thinness beat.

If they be two, they are two so
As stiff twin compasses are two;
Thy soul, the fixed foot, makes no show
To move, but doth, if the other do.

And though it in the center sit,
Yet when the other far doth roam,
It leans and hearkens after it,
And grows erect, as that comes home.

Such wilt thou be to me, who must,
Like th’ other foot, obliquely run;
Thy firmness makes my circle just,
And makes me end where I begun.

-Donne, A Valediction: Forbidding Mourning.Β 

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