"Fatherhood and motherhood are themselves a particular proof of love; they make it possible to discover love's extension and original depth.
But this does not take place automatically. Rather, it is a task entrusted to both husband and wife. In the life of husband and wife together,
fatherhood and motherhood represent such a sublime "novelty" and richness as can only be approached "on one's knees".
(Letter to Families, # 7)