Related:

• Too often people have come to me and said, "If I had just one wish for anything in all the world, I would wish for more user-defined equations in the HP-51820A Waveform Generator Software.
  -- Instrument News [Once is too often. Ed.]...
• I'll try anything once, twice if I like it, three times to make sure!
• If anything I have said offends you, well that's just too bad. :)
• Stayed in bed all morning just to pass the time, There's something wrong here
  here can be no more denying, One of us is changing, or maybe we just stopped trying, And it's too late, baby, now, it's too late, Though we really did try to make it, Something inside has died and I can't hide and I just can't fake it....
• Once a knight, always a knight, but once is King is once too often. -- Sir Bella of Eastmarch
• TWICE, adv. Once too often. -- Ambrose Bierce, "The Devil's Dictionary
• Too much of anything often leaves one with a feeling of regret.
• I 'll give you leave to call me anything, if you don't call me "spade.
  -- Jonathan Swift (1667-1745) -- Polite Conversation, Dialogue ii...