• Not 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. This comes about in many ways: by their lightening each other's burdens through mutual help; by constant and faithful love; by having all their possessions in common; and by the heavenly grace which flows from the sacrament.

    Pope Leo XIII (1990). “A Light in the Heavens: Great Encyclical Letters of Pope Leo XIII”, p.57, TAN Books