Related:

• Know thyself. -- Thale
• When Thales was asked what was difficult, he said, "To know one's self.
  And what was easy, "To advise another." -- Diogenes Laertius (c. 200 AD) -- Thales, ix...
• The most difficult thing in the world is to know how to do a thing and to watch someone else do it wrong without comment.
  -- Theodore H. White...
• The most difficult thing in the world is to know how to do a thing and to watch someone else doing it wrong, without commenting.
  -- T.H. White...
• The most difficult thing in the world is to know how to do a thing and to watch someone else do it wrong without comment.
  -- Theodore H. White...
• SLEDGE-O-MATIC: For life's most difficult problems.
• There will come a time when you will discover a thing called loneliness.
  But remember life's cruellest irony: The time you feel most lonely is the time you most need to be by yourself....
• In a social situation, the most difficult thing to do is usually the right thing to do. Meyers Law
• Meyers's Law: In a social situation, that which is most difficult to do is usually the right thing to do.