To clarify: the title is excerpted from Act 1 of Shakespeare's Love's Labour's Lost. The full quote goes:
"Light, seeking light, doth light of light beguile;
So ere you find where light in darkness lies,
Your light grows dark by losing of your eyes."
It's a warning against spending too much of your life in scholarly pursuits.
It's been obvious for a long time. Cohen finally realizes it. What next? Will he some day awaken to the fact that Bush has been an astoundingly competent and effective President?