63 Before Us stand out with painful clarity the dangers We fear will accrue to this and coming generations from the neglect or nonrecognition, the minimizing and the gradual abolition of the rights peculiar to the family. Therefore We stand up as determined defenders of those rights in the full consciousness of the duty imposed on Us by Our Apostolic office. The stress of our times, as well external as internal, material and spiritual alike, and the manifold errors with their countless repercussions are tasted by none so bitterly as by that noble little cell, the family.
Source: Summi Pontificatus (Vatican.va)