...have mercy on us, and on the whole world!
Read all about the devotion here. Back in 2008, B16 said:
Mercy is in reality the core of the Evangelical message; it is the name of God itself, the face with which He revealed Himself in the Ancient Covenant and fully in Jesus Christ, incarnation of Creative and Redemptive Love.I love the chaplet of Divine Mercy and have adopted the devotion, but I have to say I still think of today as Hunchback Sunday, just for my own amusement.