I don't know of the Sermon on the Mount coming from the OT at all.
Historians in the field consider the Sermon to be taken from the Septuagint.
"..Sermon on the Mount, which is a well-crafted literary work that cannot have come from some illiterate Galilean. In fact, we know it originated in Greek, not Hebrew or Aramaic, because it relies on the Septuagint text of the Bible for all it's features and allusions. It relies extensively on the Greek text of Deuteronomy and Leviticus especially, and in key places on other texts. For example, the section on turning the other cheek and other aspects of legal pacifism (Mt. 5.38-42) has been redacted from the Greek text of Isa. 50.6-9. These are not the words of Jesus. This famous sermon as a whole also has a complex literary structure that can only have come from a writer, not an everyday speaker.
And again, it reflects needs and interests that would have arisen after the apostles began preaching the faith and organizing communities and struggling to keep them in the fold. So it's unlikely to come from Jesus."
Carrier then demonstrates a use of triadic structure in the Sermon taken from a paper by Dale Allison - in the Journal of Biblical Literature
The argument goes on from there - it fits neatly within rabbinical debates of how Jews could fulfill the Torah after the destruction of the temple, Jesus is made into a new Moses and so on......
On The Historicity of Jesus, Richard Carrier, pg 468
What Greek, Persian and Roman mythology are you talking about?
What do you think the New Covenant should have looked like?
I would say that the later church, which was attached to the Roman Empire, did take over feast dates that the Roman Empire had.
That's a huge subject? Literally everything? Salvation, savior gods, baptism, eucharist, virgin born world saviors, God vs devil, end battle where all members get resurrected, souls get redeemed and go to an afterlife.......
Just Greek:
HELLENISTIC IDEAS OF SALVATION IN THE LIGHT OF ANCIENT ANTHROPOLOGY
PAUL WENDLAND
University of Gattingen, Germany
"
Christian and Hellenistic ideas of redemption cannot be sharply separated.
The deity's resurrection from the dead gives to the initiates, who see their own destiny prefigured in his adventures, hope of a life after death…. the soul, conscious of its divine origin, strives for redemption from its foreign and unrelated companion, the body. It seeks deliverance from things sinful, material, and mortal. But the fundamental motive in these various representations is the same; it is longing for elevation above the earthly world and its ruling powers, i.e., for deification. The end of redemption is a life of eternal blessedness. The redeemer is the deity to whose service one devotes his whole life in order to obtain his help and favor.
he ecstatic Dionysus religion becomes the most important factor in this development. In this religion t common people, the poor and the needy, directly attain a more profound and personal relation to the deity. The believer loses his individual consciousness in enthusiasm and receives the divinity into himself. In moments of orgiastic ecstasy he experiences the ultimate goal of his existence, abiding fellowship with the god, who, as redeemer and savior will free him through death from the finiteness, the suffering, and the exigencies of the earthly life. Orphism sets forth this religious experience in a mystic theology which exerts a strong influence upon Pindar and Empedocles, for example, and which suggested to Plato his magnificent treatise on the dest of the soul.
The Relationship between Hellenistic Mystery Religions and Early Christianity:
A Case Study using Baptism and Eucharist
Jennifer Uzzell
Baptism has been widely compared with initiation into the Mystery cults. In many of the Mysteries purification through ritual bathing was required as a prerequisite for initiation.
Eucharist.
-Perhaps the clearest point of contact between the Mysteries and Christian Eucharist, and one of which the Church Fathers were painfully conscious, lay in a sacramental meal of bread or cakes and wine mixed with water in which initiates to the cult of Mithras participated.
"
Within the confines of what was then the Roman Empire, long before and during the dawn of Christianity, there were many dying-and-rising gods. And yes, they were gods—some even half-god, half-human, being of divine or magical parentage, just like Jesus (
John 1:1-18;
Matthew 1:18-25;
Luke 1:26-35;
Philippians 2:6-8 &
Romans 8:3). And yes, they died. And were dead. And yes, they were then raised back to life; and lived on, even more powerful than before. Some returned in the same body they died in; some lived their second life in even more powerful and magical bodies than they died in, like Jesus did (
1 Corinthians 15:35-50 &
2 Corinthians 5:1-10). Some left empty tombs or gravesites; or had corpses that were lost or vanished. Just like Jesus. Some returned to life on “the third day” after dying. Just like Jesus. All went on to live and reign in heaven (not on earth). Just like Jesus. Some even visited earth after being raised, to deliver a message to disciples or followers, before ascending into the heavens. Just like Jesus.
Dying-and-Rising Gods: It's Pagan, Guys. Get Over It. • Richard Carrier
https://wwwc.com/topic/Hellenistic-religion/Beliefs-practices-and-institutions
These were the changes Hellenism took into all of the local religions, Christianity was the last.
-the seasonal drama was homologized to a
soteriology (salvation concept) concerning the destiny, fortune, and salvation of the individual after death.
-his led to a change from concern for a religion of national prosperity to one for individual
salvation, from focus on a particular
ethnic group to concern for every human. The prophet or
saviour replaced the priest and king as the chief religious figure.
-his process was carried further through the identification of the experiences of the soul that was to be saved with the
vicissitudes of a divine but fallen soul, which had to be redeemed by cultic activity and divine intervention. This view is illustrated in the concept of the paradoxical figure of the saved saviour,
salvator salvandus.
-Other deities, who had previously been associated with national destiny (
e.g., Zeus, Yahweh, and Isis), were raised to the status of
transcendent, supreme
-The temples and cult institutions of the various Hellenistic religions were repositories of the knowledge and techniques necessary for
salvation and were the agents of the public worship of a particular deity. In addition, they served an important sociological role. In the new,
cosmopolitan ideology that followed Alexander’s conquests, the old nationalistic and ethnic boundaries had broken down and the problem of religious and social identity had become
acute.
-Most of these groups had regular meetings for a communal meal that served the dual role of
sacramental participation (referring to the use of material elements believed to convey spiritual benefits among the members and with their deity)
-Hellenistic philosophy (Stoicism,
Cynicism, Neo-Aristotelianism, Neo-Pythagoreanism, and Neoplatonism) provided key formulations for
Jewish,
Christian, and
Muslim philosophy,
theology, and
mysticism through the 18th century
- The basic forms of worship of both the Jewish and Christian
communities were heavily influenced in their formative period by Hellenistic practices, and this remains fundamentally unchanged to the present time. Finally, the central religious literature of both traditions—the Jewish
Talmud (an
authoritative compendium of law, lore, and interpretation), the
New Testament, and the later
patristic literature of the early Church Fathers—are characteristic Hellenistic documents both in form and content.
-Other traditions even more radically reinterpreted the ancient figures. The cosmic or seasonal drama was interiorized to refer to the divine
soul within man that must be liberated.
-Each persisted in its native land with little perceptible change save for its becoming linked to
nationalistic or
messianic movements (centring on a deliverer figure)
-and
apocalyptic traditions (referring to a belief in the dramatic intervention of a god in human and natural events)
- Particularly noticeable was the success of a variety of prophets, magicians, and healers—
e.g., John the Baptist, Jesus,
Simon Magus,
Apollonius of Tyana,
Alexander the Paphlagonian, and the cult of the healer Asclepius—whose preaching corresponded to the activities of various Greek and Roman philosophic missionaries