The lines below (first in the original French, followed by an English translation) are from what poet's "The Graveyard by the Sea"?
Zénon! Cruel Zénon! Zénon d'Êlée!
M'as-tu percé de cette flèche ailée
Qui vibre, vole, et qui ne vole pas!
Zeno, Zeno, cruel philosopher Zeno,
Have you then pierced me with your feathered arrow
That hums and flies, yet does not fly!
Paul Valéry