Related:

• I'll try anything just once too often.
• KNIGHT, n. Once a warrior gentle of birth, Then a person of civic worth, Now a fellow to move our mirth.
  Warrior, person, and fellow -- no more: We must knight our dogs to get any lower....
• Please, Sir Knight... we *are* doctors.
• TWICE, adv. Once too often. -- Ambrose Bierce, "The Devil's Dictionary
• Welcome, gentle Sir Knight, to the Castle Anthrax!
• You fight with the strength of many men, sir knight.
• Thanksgiving is an emotional holiday. People travel thousands of miles to be with people they only see once a year.
  And then discover once a year is way too often. -- Johnny Carso...
• Deliberate often--decide once. Latin Proverb
• I once had half a mind left, too! :)