"The best thing in married life, for the sake of which everything ought to be suffered and done is the fact that God gives children and commands us to bring them up to serve Him. To do this is the noblest and most precious work on earth, because nothing may be done which pleases God more than the saving of souls.
If the need were to arise, all of us should be ready to die in order to bring a soul to God. So you see how rich in good works the estate of marriage is. God lays souls into the lap of married people, souls begotten from their own body, on which they may practice all Christian works. For when they teach their children the Gospel, parents are certainly their apostles, bishops, and ministers.”
-Martin Luther, What Luther Says
Please also check out my book True Christian Motherhood