This third was taught during a vision that Sister Faustina had on September 13, 1935: "I saw an angel, the executor of the wrath of God, to the point of reaching the earth. I began to implore God for the world with words I heard inwardly. As I prayed thus, I saw that the angel was forsaken, and he could no more execute just punishment. "

The next day an inner voice taught him this prayer in the beads of the rosary.

"By reciting this rosary, it pleases Me to give all that is asked of Me. When they recite the hardened sinners, I will fill their souls with peace, and their hour of death will be happy. Write this to troubled souls: When the soul sees and recognizes the gravity of its sins, when the whole abyss of the misery in which it has plunged unveiled, let it not despair, but let itself be launched with confidence in the arms of my mercy, Like a child in the arms of his dear mother. These souls have upon my merciful heart a right of precedence. Say that no soul that has turned to My mercy has been disappointed or experienced vexation. "

"When they pray this rosary with the dying, I will stand between the Father and the dying soul, not as a just Judge, but as a merciful Savior."

The rosary also includes the contemplation of certain passages of the life of Jesus and his mother Mary, who, according to the Catholic Church's doctrine, are of special relevance to the history of salvation and are called "mysteries."
The rosary was traditionally divided into three equal parts, with fifty beads each and which, because they corresponded to the third part, were called rosary.