Fermat vs Euler: should a proof be scribbled or shown?

I had a truly marvelous proof, which this margin was too narrow to contain—genius suggests, it need not exhaust.

And so you left Europe chasing your ghost for a century! I fill my pages, publish my steps, and the truth stands where all can walk upon it.

You published so much you went blind doing it, Leonhard—half your ink was cleaning up after my hints.

Blind, yes—yet I saw further than your margin ever dared, because I dared to finish the sentence.