Catholic theology
Catholic belief holds that the church exists both on earth and in heaven simultaneously, and thus the Virgin Mary and the saints are alive and part of the living church. Prayers and devotions to Mary and the saints are common practices in Catholic life. These devotions are not worship, since only God is worshiped. The church teaches that the saints "do not cease to intercede with the Father for us. ... So by their fraternal concern is our weakness greatly helped."
Catholic devotions to Jesus
The Divine Mercy is a devotion associated with reputed apparitions of Jesus revealed to Saint Faustina Kowalska. The Roman Catholic devotion and venerated image under this Christological title refers to the unlimited merciful love of God towards all people. There are a number of elements of this devotion, among which are: the devotional Divine Mercy image, the Chaplet of the Divine Mercy, and the observance of Divine Mercy Sunday. Pope John Paul II was instrumental in the formal establishment of the Divine Mercy devotion and acknowledged the efforts of the Marian Fathers in its promotion.