Related:

• If you would keep a secret from an enemy, tell it not to a friend.
• Hear no ill of a friend, nor speak any of an enemy. -- Ben Frankli
• What you would seem to be, be really. -- Ben Frankli
• To whom thy secret thou dost tell, to him thy freedom thou dost sell. -- Ben Frankli
• It is wise not to seek a secret and honest not to reveal it. -- Ben Frankli
• Clean your finger before you point at my spots. -- Ben Frankli
• Your enemy is never a villain in his own eyes. Keep this in mind
  it may offer a way to make him your friend. If not, you can kill him without hate - and quickly....