Question:
In the Eastern Catholic Churches, Can One Receive Communion with a Serious Sin on One’s Soul?
Answer:
The Catechism of the Catholic Church:
1457 … Anyone who is aware of having committed a mortal sin must not receive Holy Communion, even if he experiences deep contrition, without having first received sacramental absolution, unless he has a grave reason for receiving Communion and there is no possibility of going to confession.57 …
57 Cf. Council of Trent (1551): DS 1647; 1661; CIC, can. 916; CCEO, can. 711.
The Catechism References there the Eastern Code of Canon Law 711 which goes into that one is not to receive the Divine Eucharist if one is conscious of serious sin (mortal sin) (outside the exceptional circumstance of a serious reason (grave reason), no possibility of confession, act of perfect contrition and resolve to go to confession as soon as possible–see the Canons for details).
scborromeo.org/ccc/ccc_toc.htm
And from the Byzantine Catholic Church in America website -from the Congregation for the Eastern Churches :
“In it, as affirmed by can. 718 of the Code of Canons of the Eastern Churches, the faithful who have committed sins after Baptism and resolve to lead a new life, “through the ministry of the priest, having themselves made a confession and accepted an appropriate penance, obtain forgiveness from God and at the same time are reconciled with the Church.” This confession, individual and integral, with absolution, constitutes the
only ordinary means by which the Christian faithful aware of a serious sin can obtain omission.[74] Even if serious sins have not been committed, it is strongly recommended that all the Christian faithful frequently receive this sacrament, especially during times of fasts and penance.”
byzcath.org/
In MISERICORDIA DEI Pope John Paul II noted noted:
“Individual and integral confession and absolution are the sole ordinary means by which the faithful, conscious of grave sin, are reconciled with God and the Church; only physical or moral impossibility excuses from such confession, in which case reconciliation can be obtained in other ways”
and in ECCLESIA DE EUCHARISTIA from Bl. Pope John Paul II again
“If a Christian’s conscience is burdened by serious sin, then the path of penance through the sacrament of Reconciliation becomes necessary for full participation in the Eucharistic Sacrifice.”
And Pope Benedict XVI in his Catecheses with Children said:
"Only in that case, when you are in a state of “mortal” sin, in other words, grave (sin), is it necessary to go to confession before Communion. This is my first point. "
vatican.va/holy_father/be…ildren_en.html
The Compendium of the Catechism issued by Pope Benedict XVI and which he entrusted to “the entire Church”.
"304. Which sins must be confessed?
1456
All grave sins not yet confessed, which a careful examination of conscience brings to mind, must be brought to the sacrament of Penance. The confession of serious sins is the only ordinary way to obtain forgiveness." (see also both codes of Canon Law …).
- What is required to receive Holy Communion?
1385-1389
1415
To receive Holy Communion one must be fully incorporated into the Catholic Church and be in the state of grace, that is, not conscious of being in mortal sin. Anyone who is conscious of having committed a grave sin must first receive the sacrament of Reconciliation before going to Communion.
vatican.va/archive/compendium_ccc/documents/archive_2005_compendium-ccc_en.html