I did manage to receive only the phrase "Mayst thou thy peace discov'r" without the first part before (I know it's not really important, but it's interesting).
-I had given her the eyes already
-I had not initiated the kneeling sequence yet
-I might have killed her and regifted the eyes (can't remember for sure)
-It was relatively close to the end of the game
-I had completed the Ariandel DLC but not the Ringed City