Related:

• When you speak to others for their own good it's advice
  when they speak to you for your own good it's interference....
• Sleep not when others speak, sit not when others stand, speak not when you should hold your peace, walk not on when others stop.
  -- George Washingto...
• It may be bad manners to talk with your mouth full, but it isn't too good either if you speak when your head is empty.
• I'm only telling you this for your own good...
• At least 75 times in your life, someone will tell you that something is "for your own good.
  It will never be for your own good....
• If you would understand your own age, read the works of fiction produced in it.
  People in disguise speak freely....
• Frank and explicit--that is the right line to take when you wish to conceal your own mind and confuse the minds of others.
  -- Benjamin Disraeli...