No human law can abolish the natural and original right of marriage, nor in any way limit the chief and principal purpose of marriage ordained by Godโs authority from the beginning: โIncrease and multiply.
Pope Leo XIIIThe twentieth century must be a century of the Blessed Sacrament if it means to be a century of resurrection and of life
Pope Leo XIIINot only, in strict truth, was marriage instituted for the propagation of the human race, but also that the lives of husbands and wives might be made better and happier.
Pope Leo XIIITo refuse any bond of union between man and civil society, on the one hand, and God the Creator and consequently the supreme Law-giver, on the other, is plainly repugnant to the nature, not only of man, but of all created things; for, of necessity, all effects must in some proper way be connected with their cause; and it belongs to the perfection of every nature to contain itself within that sphere and grade which the order of nature has assigned to it, namely, that the lower should be subject and obedient to the higher.
Pope Leo XIII