Archimandrite Zacharias of St John the Baptist Monastery in Essex England has told this story.
He tells of a Greek priest he knows who has three sons who are like angels. One is a priest, and the others serve in the altar with their father. This is, lamentably a rare thing: for the children to grow up with the piety of their parents.
Fr Zacharias asked this priest why his children were so angelic. The priest replied that he has never taught his children anything about the faith, but since they were little, has had the custom of kneeling beside their bed while they were sleeping for a half hour and praying that the Lord would put in their hearts what they should know.
The life of this simple priest and his angelic sons is a sobering wakeup.