Section — McHugh–Callan, Moral Theology
Requirements for Lawful Reception
Requirements for Lawful or Fruitful Reception of a Sacrament by an Adult
Requirements for Lawful or Fruitful Reception of a Sacrament by an Adult.—(a) Worthiness of the Recipient from Divine Law.—The two Sacraments of the Dead, Baptism and Penance, were intended by Christ to be means of forgiveness to the repentant, and hence they require at least that the recipient believe himself attrite. The five Sacraments of the Living were meant by Christ to strengthen grace and life already had, and consequently he who approaches them must have no serious fault on his conscience. Conscious unworthiness is a sacrilege, and only extreme necessity can excuse reception in such a state (e.g., when a sinner takes Communion to save the Host from profanation).
(b) Worthiness from Church Law.—The recipient must be free from church censures (Canon 2260) or impediments, and must possess the preparation or qualification which the church law prescribes (e.g., a certain age is required for Confirmation; the Eucharist must be received fasting; the candidate for Orders must be approved, etc.).
(c) Worthiness of Reception.—The Sacraments should be received devoutly, with proper preparation, attention, and thanksgiving. In the case of the Eucharist, though intention is not necessary for validity, it is required for a sacramental or fruitful Communion; an habitual and implicit intention suffices for the Viaticum (and Easter Communion), an habitual explicit intention for Communion of devotion.