Possible Clues:

• Opposite of eternally
• To quote this you'd sound as if you were ravin'
• 'Quoth the Raven, - - ' (Poe)
• Only thing said by the raven in "The Raven"
• Not again would one sound ravin' if one were to quote this
• Raven's remark
• This could be less of what you say if you sound as if you're ravin'
• Poe: ` `Quoth the Raven, .........
• You'd need to sound as if you were ravin' to say that
• Postponement sine die threatened by large corvid