From a reader:
we will be on a Greek island without a Catholic church on a Sunday:
can we attend the Greek mass and/or receive the Sacrament?
You can, and I think should, attend the Greek Divine Liturgy if attending a Catholic Mass is not possible. The impossibility of attending a Catholic Mass in a Catholic church or chapel that day absolves you of your obligation (no one is bound by law to do what is impossible).
Even though you can’t fulfill your canonical Sunday obligation, and therefore you are absolved of that obligation, you still have an obligation in natural law to worship God.
Since the Liturgy of the Greek Church is valid and reverent, you can surely fulfill your natural law obligation than to worship with the Greek Orthodox Church.
As to the reception of Holy Communion, can. 844 §2 states,
“whenever necessity requires or a genuine spiritual advantage commends it, and provided the danger of error indifferentism is avoided, Christ’s faithful for whom it is physically or morally impossible to approach a Catholic minister, may lawfully receive the sacraments of penance, the Eucharist, and anointing of the sick from non-Catholic ministers in whose Churches these sacraments are valid.”
Therefore, it is possible, from the Catholic perspective, to receive. However, the Greek Orthodox Church may differ!
As I understand it, the Orthodox do not entirely agree with us on this principle. They will not, as I understand it, administer the Eucharist to non-Orthodox congregants. In other words, we say we may receive from them, but they say they will not give to us.
Out of respect for their law and practices, it would probably be best not to approach to receive Communion.
You have, instead, the opportunity to make a Spiritual Communion.
Use Communion time to pray, not only for the unity of our Church, as Christ Himself willed, but also for all those who should not receive the Eucharist, perhaps because of irregular marriage situations or even the lack of a priest for their parish.
And I’ll just say it again:
Benedict XVI was the Pope of Christian Unity.
Some people are shocked that I suggested attending liturgical worship of God in an Orthodox Church. Some even suggest that I am advocating mortal sin.