A stanza from a poem entitled The Raven by Edgar Allan Poe:
Presently my soul grew stronger; hesitating then no longer,
Sir," said I, "or Madam, truly your forgiveness I implore;
But the fact is I was napping, and so gently you came rapping,
And so faintly you came tapping, tapping at my chamber door,
That I scarce was sure I heard you"— here I opened wide the door; —
Darkness there, and nothing more.
I'm not sure how to properly understand that line. Could you please break it down for me?