It is a beggar's pride that he is not a thief.

Related:

• There is no pride like that of a beggar grown rich.
  French...
• He who holds the ladder is as bad as the thief.
  German...
• He who steals once is always a thief.
  Spanish...
• Set a thief to catch a thief.
  French...
• To teach is to learn. --
  Japanese...
• Plenty brings
  pride. --...
• The beggar is never out of his
  way. --...
• An excess of courtesy is a discourtesy.
  Japanese...
• He who travels for love finds a thousand miles not longer than one.
  Japanese...