113 Let then, those who are about to enter on married life, approach that state well disposed and well prepared, so that they will be able, as far as they can, to help each other in sustaining the vicissitudes of life, and yet more in attending to their eternal salvation and in forming the inner man unto the fullness of the age of Christ. It will also help them, if they behave towards their cherished offspring as God wills: that is, that the father be truly a father, and the mother truly a mother; through their devout love and unwearying care, the home, though it suffer the want and hardship of this valley of tears, may become for the children in its own way a foretaste of that paradise of delight in which the Creator placed the first men of the human race. Thus will they be able to bring up their children as perfect men and perfect Christians; they will instill into them a sound understanding of the Catholic Church, and will give them such a disposition and love for their fatherland as duty and gratitude demand.
Source: Casti Connubii (Vatican.va)