Faithful are the wounds of a friend; but the kisses of an enemy are deceitful.
All Commentaries on Proverbs 27:6 Go To Proverbs 27
Ambrose of Milan
AD 397
The wounds of love are good too, better than kisses. For “useful are the wounds of a friend; profuse are the kisses of an enemy.” Peter wounds, and Judas kisses. But the kiss condemned Judas because it carried a traitorous venom; the wound inflicted by Peter also cured him because he washed away his fault with tears.