Known sourcecanonical
"The night has a thousand eyes, And the day but one; Yet the light of the bright world dies With the dying sun. The mind has a thousand eyes, And the heart but one; Yet the light of a whole life dies When love is done."
Francis W. Bourdillon / Light.
Light.
Bartlett's Familiar Quotations, 9th ed. (Little, Brown, 1905), public domain