One of Edgar Allan Poe's greatest works is called the "The
Raven". It was written during the time his wife/second cousin
was dying. It's a poem about a man who was mourning for his
lost wife. When suddenly he heard someone tapping at his door.
When he opened his door, there was no one there. When he sat
back down, he heard the tapping again except louder at his
window. He opened his window and, "In there stepped a stately
Raven of the saintly days or yore". The Raven flew in and
perched in top of his chamber door. The Raven just sat there and
the main character started to talk to the Raven and ask it, "tell
me what thy lordly mane is on the night's Plutonian shore". But
all the Raven says was "Nevermore". The main character just
kept talking to the Raven and thinking how rare it was for a bird
to perch on top of a door and only say "Nevermore".
The main
character started to get pissed off and yelled at the Raven and
the Raven just sat there, really still, and repeated the word
"Nevermore".