In "On the Holy Fasts," the St. John addresses the necessity of discernment as a divine gift that helps individuals distinguish between good and evil. He articulates the importance of timing in communication, advocating for silence when appropriate and speaking only when necessary. The text also touches on the significance of ecclesiastical peace, which is portrayed as a profound mystery central to Christian belief, emphasizing harmony and the avoidance of strife. John expresses his reflections in response to the virtue of Lord Comita, encouraging understanding and respect for the sacred traditions of the Church.