Ward: Abba Poemen said, "If a man has sinned and denies it, saying: 'I have not sinned,' do not reprimand him; for that will discourage him.
But say to him, Do not lose heart, brother, but be on guard in future,' and you will stir his soul to repentance."
Source, in full
Wortley: Abba Poemen said: “If a person sin and deny it, saying: ‘I have not sinned,’ do not condemn him, or you will cut off his eagerness. / But if you say to him: ‘Do not be disheartened, brother, and do not despair of yourself but be on your guard in future,’ you rouse his soul to repentance.”
Notes from Wikiquote
Saying 23