...without leaving a trace !
This is the story of the devil coming down a street with a friend.
They see before them a man who stops, picks up something, looks at it and puts it in his pocket.
The friend says to the devil:
'What does he could have found?'.
'A piece of truth "says the devil.
'Very bad for you, that' remarks the friend.
'Not at all' replies the devil, 'I'll make him institutionalized it.'