Mind You Meaning

(literally archaic) Mind that you; be careful that you.

Example:   Mind you, I'm not prejudiced, but I didn't like the looks of him.‎
1977, Agatha Christie, An Autobiography, Part II, chapter4:
  Mind you, clothes were clothes in those days. There was a great deal of them, lavish both in material and in workmanship.
  Mind you wear a scarf in this cold wind.‎
1841, Charles Dickens, Barnaby Rudge, chapter 13:
  â€œMind you take good care of her, sir,” said John, appealing from this insensible person to his son and heir, who now appeared, fully equipped and ready.