25 And the charity which has been weakened and cooled in many, how can it fail to be rekindled into love in the souls of those who recall with a full heart the tortures and death of our Redeemer and the afflictions of His Sorrowful Mother? From this charity towards God, then, there cannot but rise a more intense love of one's neighbor if one dwells on the labors and sorrows that Our Lord suffered for all, reinstating the lost inheritance of the children of God.
Source: Ingravescentibus Malis (Vatican.va)