Age of Reason

Age of Reason, the name given to that period of human life at which persons are deemed to begin to be morally responsible. This, as a rule, happens at around the age of seven, or thereabouts, though the use of reason requisite for moral discernment may come before, or may be delayed until notably after, that time.

In the case of First Communion, there is no age restriction. The Church simply requires that children possess the use of reason, know and understand what the Eucharist is, and are properly disposed. Canon law states,

The administration of the Most Holy Eucharist to children requires that they have sufficient knowledge and careful preparation so that they understand the mystery of Christ according to their capacity and are able to receive the body of Christ with faith and devotion. (CIC 913 §1)

It is primarily the duty of parents and those who take the place of parents, as well as the duty of pastors, to take care that children who have reached the use of reason are prepared properly and, after they have made sacramental confession, are refreshed with this divine food as soon as possible. It is for the pastor to exercise vigilance so that children who have not attained the use of reason or whom he judges are not sufficiently disposed do not approach Holy Communion. (CIC 914)