Ratzinger on Purgatory

 

"Purgatory is not, as Tertullian thought, some kind of supra-worldly concentration camp where man is forced to undergo punishment in a more or less arbitrary fashion. Rather it is the inwardly necessary process of transformation in which a person becomes capable of Christ, capable of God, and thus capable of unity with the whole communion of saints".

Joseph Ratzinger, Eschatology: Death and Eternal Life, CUA Press, p. 230. 

Frequency of receiving the Eucharist - earliest reference?

"And on the day which is called the day of the sun there is an assembly of all who live in the towns or in the country; and the memoirs of the Apostles or the writings of the Prophets are read, as long as time permits. Then the reader ceases, and the president [i.e., the bishop or his designate] speaks, admonishing us and exhorting us to imitate these excellent examples. Then we arise all together and offer prayers; and, as we said before, when we have concluded our prayer, bread is brought, and wine and water, and the president in like manner offers up prayers and thanksgivings with all his might; and the people assent with "Amen"; and there is the distribution and partaking by all of the Eucharistic elements; and to them that are not present they are sent by the hand of the deacons."

St. Justin Martyr, First Apology 

Orthodox Church and Purgatory

The Orthodox Church does not believe in purgatory (a place of purging), that is, the inter-mediate state after death in which the souls of the saved (those who have not received temporal punishment for their sins) are purified of all taint preparatory to entering into Heaven, where every soul is perfect and fit to see God.

Also, the Orthodox Church does not believe in indulgences as remissions from purgatorial punishment. Both purgatory and indulgences are inter-correlated theories, and according to the Orthodox, unwitnessed in the Bible or in the Ancient Church. However, the below decree does seem to indicate that the Orthodox position - if not the same -  seems similar to Purgatory.

Orthodox Council of Jerusalem 1672

Decree 18

We believe that the souls of those that have fallen asleep are either at rest or in torment, according to what each has done; — for when they are separated from their bodies, they depart immediately either to joy, or to sorrow and lamentation; though confessedly neither their enjoyment nor condemnation are complete. For after the common resurrection, when the soul shall be united with the body, with which it had behaved itself well or ill, each shall receive the completion of either enjoyment or of condemnation.

And the souls of those involved in mortal sins, who have not departed in despair but while still living in the body, though without bringing forth any fruits of repentance, have repented — by pouring forth tears, by kneeling while watching in prayers, by afflicting themselves, by relieving the poor, and finally by showing forth by their works their love towards God and their neighbor, and which the Catholic Church has from the beginning rightly called satisfaction — [their souls] depart into Hades, and there endure the punishment due to the sins they have committed. But they are aware of their future release from there, and are delivered by the Supreme Goodness, through the prayers of the Priests, and the good works which the relatives of each do for their Departed; especially the unbloody Sacrifice benefiting the most; which each offers particularly for his relatives that have fallen asleep, and which the Catholic and Apostolic Church offers daily for all alike. Of course, it is understood that we do not know the time of their release. We know and believe that there is deliverance for such from their direful condition, and that before the common resurrection and judgment, but when we know not.

Eastern Christianity liturgy according to Saint John Paul II

 

In Venice, before the representatives of the ecclesiastical world, who held a rather narrow idea of the Church and were opposed to this vision, Saint Cyril defended it with courage. He showed that many peoples had already in the past introduced and now possessed a liturgy written and celebrated in their own language, such as " the Armenians, the Persians, the Abasgians, the Georgians, the Sogdians, the Goths, the Avars, the Tirsians, the Khazars, the Arabs, the Copts, the Syrians and many others".

Reminding them that God causes the sun to rise and the rain to fall on all people without exception, he said: "Do not all breathe the air in the same way? And you are not ashamed to decree only three languages (Hebrew, Greek and Latin), deciding that all other peoples and races should remain blind and deaf! Tell me: do you hold this because you consider God is so weak that he cannot grant it, or so envious that he does not wish it?". To the historical and logical arguments which they brought against him Cyril replied by referring to the inspired basis of Sacred Scripture: "Let every tongue confess that Jesus Christ is Lord, to the glory of God the Father"; "All the earth worships you; they sing praises to you, sing praises to your name"; "Praise the Lord, all nations! Extol him, all peoples!".

...

Furthermore, the translation of the sacred books, carried out by Cyril and Methodius together with their pupils, conferred a capacity and cultural dignity upon the Old Slavonic liturgical language, which became for many hundreds of years not only the ecclesiastical but also the official and literary language, and even the common language of the more educated classes of the greater part of the Slav nations, and in particular of all the Slavs of the Eastern Rite. It was also used in the Church of the Holy Cross in Cracow, where the Slav Benedictines had established themselves. Here were published the first liturgical books printed in this language. Up to the present day this is the language used in the Byzantine liturgy of the Slavonic Eastern Churches of the Rite of Constantinople, both Catholic and Orthodox, in Eastern and South Eastern Europe, as well as in various countries of Western Europe. It is also used in the Roman liturgy of the Catholics of Croatia.

22. In the historical development of the Slavs of Eastern Rite, this language played a role equal to that of the Latin language in the West. It also lasted longer than Latin in part until the nineteenth century-and exercised a much more direct influence on the formation of the local literary languages, thanks to its close kinship with them. These merits vis-à-vis the culture of all the Slav peoples and nations make the work of evangelization carried out by Saints Cyril and Methodius in a certain sense constantly present in the history and in the life of these peoples and nations.

John Paul II, Encyclical Slavorum Apostoli about two saintly brothers, Saints Cyril and Methodius (2 June 1985).