Ecce Petrus Pontifex... Behold Peter, the high priest. Leo XXI, himself: "Whom alone, God did appoint Prince over all countries and kingdoms, to root up, pull down, waste, destroy, plant, and build, that he might preserve a faithful people-" And yet in the face of Leo, the monk saw a kindly meekness which hinted that he was worthy of that title, loftier than any bestowed upon princes and kings, whereby he was called "the slave of the slaves of God."