13 But Christian parents must also understand that they are destined not only to propagate and preserve the human race on earth, indeed not only to educate any kind of worshippers of the true God, but children who are to become members of the Church of Christ, to raise up fellow-citizens of the Saints, and members of God's household, that the worshippers of God and Our Savior may daily increase.
Source: Casti Connubii (Vatican.va)