Jesus said later to Sister Faustina "Say unceasingly this chaplet that I have taught you. Anyone who says it will receive great Mercy at the hour of death. Priests will recommend it to sinners as the last hope. Even the most hardened sinner, if he recites this Chaplet even once, will receive grace from my infinite Mercy. I want the whole world to know My infinite Mercy. I want to give unimaginable graces to those who trust in My Mercy."
The Chaplet can be said on ordinary Rosary beads.
"First say one 'Our Father", 'Hail Mary' and 'I believe in God'.
Then on the 'Our Father' beads say the following words:
'Eternal Father, I offer You the Body and Blood, Soul and Divinity of Your dearly beloved Son, Our Lord Jesus Christ, in atonement for our sins and those of the whole world'.
On the 'Hail Mary' beads you will recite the following words:
'For the sake of His sorrowful Passion have mercy on us and on the whole world'
In conclusion you will recite three times these words:
`Holy God, Holy Mighty One, Holy Immortal One, have mercy on us and on the whole world,'