The ancient Egyptians wrote epistles, most often for pedagogical reasons. Egyptologist Edward Wente speculates that the Fifth-dynasty Pharaoh Djedkare Isesi—in his many letters sent to his viziers—was a pioneer in the epistolary genre. Its existence is firmly attested during the Sixth Dynasty of the Old Kingdom, and is prominently featured in the educational guide The Book of Kemit written during the Eleventh Dynasty. A standardized formulae for epistolary compositions existed by the time of the Middle Kingdom of Egypt. The epistolary formulae used in the Ramesside Period found its roots in the letters composed during the Amarna Period of the Twentieth Dynasty. Wente describes the "Satirical Letter" found on the Papyrus Anastasi I of the Nineteenth Dynasty as an epistle which was commonly copied as a writing exercise by Egyptian schoolchildren on ceramic ostraca. Epistle letters were also written to the dead, and, by the Ramesside Period, to the gods; the latter became even more widespread during the eras of Persian and Greek domination.
Epistles in prose and verse were a major genre of literature among the Greeks and particularly the Romans. The letters of Cicero are one of the most important sources on the history of the late Roman Republic and preserve features of colloquial Latin not always in evidence in his speeches and treatises. The letters of Pliny the Younger likewise are studied as both examples of Latin prose with self-conscious literary qualities and sources for historical information. Ovid produced three collections of verse epistles, composed in elegiac couplets: the Heroides, letters written in the person of legendary women to their absent lovers; and the Tristia and Ex Ponto, written in first person during the poet's exile. The epistles of Seneca, with their moral or philosophical ruminations, influenced later patristic writers.
Form of Christian epistles
Christian epistles, both those in the New Testament and among the early Christian Fathers, were written in accordance with the formalized, Hellenistic tradition. This reflects the amount of Hellenistic influence upon the epistle writers, especially in the case of Paul. Classicist Steve Reece has compared thousands of Greek, Roman, and Jewish letters contemporary with Paul and observes that Paul follows many of the normal epistolary conventions.
Opening
In contrast to modern letters, epistles usually named the author at the very beginning, followed by the recipient. The scribe who wrote down the letter may be named at the end of the epistle. In the absence of a postal system, the courier may also be named. After the names of the author and recipient, Pauline epistles often open with the greeting, "Grace and peace to you." "Grace" was a common Hellenistic greeting, while "peace" was the common Jewish greeting; this reflected Paul's dual identity in Jewish faith and Hellenistic culture. There may also be a word of thanks to the audience. In secular letters, a prayer or wish for health followed.
Body
The body begins with a brief statement introducing the main topic of the entire body.
These are letters written by some very early Christian leaders, in the 1st or 2nd century, which are not part of the New Testament. They are generally considered to form part of the basis of Christian tradition. The ennobling word "epistle" is used partly because these were all written in Greek, in a time period close to when the epistles of the New Testament were written, and thus "epistle" lends additional weight of authority.
In the context of a liturgy, epistle may refer more specifically to a particular passage from a New Testament epistle —sometimes also from the Book of Acts or the Revelation of John, but not the Four Gospels—that is scheduled to be read on a certain day or at a certain occasion.
In the Divine Liturgy of the Eastern Orthodox Church and the Byzantine Rite Catholics the Epistle reading is called the Apostol. The Apostol includes the Acts of the Apostles as well as the Epistles, but never the Apocalypse. Unlike the Latin Rite there are never readings from the Old Testament. There are Epistle lessons for every day of the year, except for weekdays during Great Lent, when the Divine Liturgy is not celebrated. These daily Epistle readings are a part of the Paschal cycle, being ultimately dependent upon the date of Pascha. There are also lessons appointed for the feast days of numerous saints and commemorations. There may be one, two, or three readings from the Apostol during a single Liturgy. The Epistle is read between the Prokeimenon and the Alleluia. The Epistle reading is always linked to a reading from the Gospel, though some services, such as Matins, will have a Gospel lesson, but no Epistle. A number of services besides the Divine Liturgy will have an Epistle and Gospel reading. Such services often include a Prokeimenon and Alleluia as well. The Epistle is chanted by the reader, though at a Hierarchical Liturgy, it is read by a deacon. The one who chants the Epistle also reads the verses of the Prokeimenon.'''
Medieval Epistles
During the Middle Ages, the art of letter writing was taught in numerous manuals, and the ars dictaminis became an important genre of instructional discourse. The necessity for letter writing was in large part due to the general deterioration of civil life and the decay of the Roman road system in the early Middle Ages, factors that obliged literate people with business to transact to send letters instead of travel themselves. A vast number of letters and letter-writing manuals were written in the period's lingua franca, Latin.
