Related:

• To criticize the incompetent is easy; it is more difficult to criticize the competent.
• Paranoids are people, too; they have their own problems.
  It's easy to criticize, but if everybody hated you, you'd be paranoid too. -- D.J. Hick...
• Marge: Homer, it's very easy to criticize... Home
  and fun, too! Episode: when Homer coaches Bart's football team...
• The men and women are lifting the world upward and onward are those who encourage more than criticize.