

This article is an excerpt from the Shortform book guide to "The Immortality Key" by Brian C. Muraresku. Shortform has the world's best summaries and analyses of books you should be reading.
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What is “proto-Christianity”? How did Christianity replace paganism and other mystical traditions?
Christianity arrived in Greece in AD 49 with Saint Paul, but it didn’t become the official religion of the Greco-Roman world until AD 392. Before that, the polytheistic pagan and Christian traditions existed simultaneously throughout the region. Brian Muraresku refers to the Christian practices during this time period as “proto-Christianity.”
In this article, we’ll discuss the characteristics, beliefs, and practices of proto-Christianity that were likely to have appealed to a polytheistic pagan community with a rich mystical tradition.
The Gnostic Gospels
An important source for understanding proto-Christianity, and its overlap with Greek paganism, are the Gnostic Gospels. These are a collection of books purportedly written by followers of Jesus, likely between AD 120 and 150. Although the writers themselves professed to be devotees of Jesus and claimed to be revealing truths from him, leaders of the early Christian church omitted these books from the Biblical canon, and they were lost to history until they were unearthed in Egypt in 1945.
Muraresku says the Gnostic Gospels were originally part of the Christian scriptures but were later eliminated because they encouraged experiencing direct union with God. He explains that the more orthodox leaders of the Church wanted the priests to be the only arbiters of God because people who have their own direct experience of God are harder to convert and control. So they ultimately sought to keep the populace from these mystical experiences.
Muraresku believes these gospels provide a window into the beliefs and traditions that defined proto-Christianity, and that they explain why it would have appealed to the ancient Greeks—because, he says, Christianity in its original form was itself a mystical tradition.
Jesus as Dionysus
So, Muraresku establishes that the form of Christianity that arrived in Greece in AD 49 was likely characterized by mysticism, making the philosophy and practices understandable to the existing population. But why would people who already have a pantheon of gods and goddesses have any interest in a new god or prophet? Muraresku says this new prophet would have to be relatable and recognizable, and he argues that this was the case because Jesus was essentially another form of Dionysus, the god of ecstasy who was worshiped in the Eleusinian rituals.
The two had several similarities that would have made Jesus a recognizable (and acceptable) figure to the Greeks, including:
Immaculate conception:
- Dionysis is the son of the god Zeus and a young human woman named Semele, who is described as a “maiden” or “virgin.” He’s conceived when Zeus visits Semele in the form of an eagle and is described in the mythology as the only begotten son of God. His birthday is celebrated around the Winter solstice.
- Jesus is the son of God and a young virgin woman, Mary. He’s conceived when God visits Mary in the form of a dove. He’s described in the Gospel of John as the only begotten son of God. He’s said to have been born around the Winter solstice.
Turning water into wine:
- Turning water into wine was Dionysus’s specialty. Dionysus was associated with a miracle that occurred every year on January 5 when a spring in the temple would start flowing with wine, called “God’s Gift Day.”
- The Gospel of John tells the story of Jesus performing the miracle of turning water into wine at a wedding feast. The wedding is said to have occurred on January 6, which Christians now celebrate as “Epiphany.”
Blood as wine offers immortality:

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- The secret that kept ancient Greeks and early Christians from fearing death
- The origins of Christianity and its overlap with pre-existing pagan customs
- The real reason why women can't be priests