The Lord addresses an invitation to us, urging us to reveive him in the sacrament of the Eucharist: 'Truly, I say to you, unless you eat of the Son of man and drink his blood, you have no life in you.'
(Catechism of the Catholic Church
1384).
The Church obliges the faithful 'to take part in the Divine Liturgy on Sundays and feast days' and, prepared by the sacrament of Reconciliation, to receive the Eucharist at least once a year, if possible during the Easter season. But the Church strongly encourages the faithful to recive the holy Eucharist on Sundays and feast days, or more often still, even daily
(Catechism of the Catholic Church
1389).