"Let us be encouraged to carry out the work of mercy of "praying for the dead" (through personal prayer, the recitation of the Holy Rosary, holy hours offered in reparation, and most importantly, the Holy Mass), to visit their tombs in order to honor our roots and become aware of the temporariness of our lives on this earth. Thus we will be enlightening our brothers and sisters in the faith and all men and women of good will."
January 1, 1970
https://en.wikiquote.org/wiki/Tridentine_Mass