“Any life, however long and complicated it may be, actually consists of a single moment — the moment when a man knows forever more who he is.”
— Jorge Luis Borges, “A Biography of Tadeo Isidoro Cruz”, in The Aleph (1949); tr. Andrew Hurley, Collected Fictions (1998)
What is the moment that defines your protagonist? When does it take place relative to the events of your story?