The Chaplet of the Divine Mercy is rooted in traditional themes of God's mercy, particularly for those burdened in their consciences by sin. St. Faustina Kowalska, who, after a vision from Christ, created the Chaplet of the Divine Mercy, recommended the Chaplet especially to those who are particularly vexed by a sinful past or the ongoing struggle against habitual or persistent sin in the present. This guide provides an introduction to St. Faustina and the Chaplet of Divine Mercy, and three methods to pray.