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				narf poit chez BOOM said: 
...Usually that phrase is used to justify hating people for not living up to unrealistic expectations.  
			
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 Well it's from Warhammer 40K, probably said by an Inquisitor. A setting where failing to survive being shot at means you don't believe in the Emperor enough.
although I do feel it has some merit. It would take a discussion about original sin and the needs of small children to explain it.