Thus, the last will be first, and the first will be last.
-- Mt 20:1-16
Each of the two sexes is an image of the power and tenderness of God, with equal dignity though in a different way. The union of man and woman in marriage is a way of imitating in the flesh the Creator's generosity and fecundity: "Therefore a man leaves his father and his mother and cleaves to his wife, and they become one flesh." All human generations proceed from this union.
-- CCC 2335
Sacred Scripture and the Church's traditional practice see in large families a sign of God's blessing and the parents' generosity.
-- CCC 2373