Catechism in a Year
Friday, September 21, 2018
293. When is it possible to give Holy Communion to other Christians?
Catholic ministers may give Holy Communion licitly to members of the Oriental Churches which are not in full communion with the Catholic Church whenever they ask for it of their own will and possess the required dispositions. Catholic ministers may licitly give Holy Communion to members of other ecclesial communities only if, in grave necessity, they ask for it of their own will, possess the required dispositions, and give evidence of holding the Catholic faith regarding the sacrament.
Further reading: CCC 1398-1401
294. Why is the Eucharist a "pledge of future glory"?
The Eucharist is a pledge of future glory because it fills us with every grace and heavenly blessing. It fortifies us for our pilgrimage in this life and makes us long for eternal life. It unites us already to Christ seated at the right hand of the Father, to the Church in heaven and to the Blessed Virgin and all the saints.
In the Eucharist, we "break the one bread that provides the medicine of immortality, the antidote for death and the food that makes us live forever in Jesus Christ." (Saint Ignatius of Antioch)
Further reading: CCC 1402-1405
These excerpts are from the Compendium of the CCC.