Vers'd in geometric lore

... Oh eternal light!
Sole in thyself that dwellst; and of thyself
Sole understood, past, present, or to come!
Thou smiledst; on that circling, which in thee
Seem'd as reflected splendour, while I mus'd;
For I therein, methought, in its own hue
Beheld our image painted: steadfastly
I therefore por'd upon the view. As one
Who vers'd in geometric lore, would fain
Measure the circle; and, though pondering long
And deeply, that beginning, which he needs,
Finds not; e'en such was I, intent to scan
The novel wonder, and trace out the form,
How to the circle fitted, and therein
How plac'd: but the flight was not for my wing;
Had not a flash darted athwart my mind,
And in the spleen unfolded what it sought.
Here vigour fail'd the tow'ring fantasy:
But yet the will roll'd onward, like a wheel
In even motion, by the Love impell'd,
That moves the sun in heav'n and all the stars.

-- Paradiso XXXIII, 126-145 (tr. Henry Francis Cary, 1772-1844)