What do the three ‘great’ Abrahamic religions have in common?

They all started with visions, hallucinations, dreams and mystic revelations. They’re not only based on these but owe their very existence to encounters with the supernatural that took place entirely within people’s heads. This of course is if they happened at all; many of these encounters with angels and God’s revelations take place in stories that have all the characteristics of myth or legend. Even so, they reveal much about the primitive state of mind (still around today) that believed God frequently revealed himself to, and in the minds of, chosen individuals.

First, the grand-daddy of the Abrahamic religions, Judaism: 

When Abram was 99 years old, YHWH appeared to him. He said to Abram, “I am El Shadday. Live in my presence with integrity. I will give you my promise, and I will give you very many descendants.” Immediately, Abram bowed with his face touching the ground, and again Elohim spoke to him, My promise is still with you. You will become the father of many nations. So your name will no longer be Abram [Exalted Father] but Abraham [Father of Many] because I have made you a father of many nations. I will give you many descendants. Many nations and kings will come from you. I will make my promise to you and your descendants for generations to come as an everlasting promise. I will be your Elohim and the God of your descendants. (Genesis 17)

Then Moses:

The Angel of YHWH appeared to (Moses) in a flame of fire from the midst of a bush. So he looked, and behold, the bush was burning with fire, but the bush was not consumed.

Then Moses said, “I will now turn aside and see this great sight, why the bush does not burn.”

So when YHWH saw that he turned aside to look, Elohim called to him from the midst of the bush and said, “Moses, Moses!” And he said, “Here I am.” (Exodus 3)

Notice how the inner voice goes from being that of ‘the angel of YHWH’ to YHWH himself (or one of his aliases). The entire scenario is preposterous of course, as is the Abraham episode before it. I’ve omitted the other occasions YHWH is said to appear to Abraham, including the infamous Genesis 22, where YHWH instructs Abraham to sacrifice his son. These stories are legends written, created from whole cloth, centuries after Abraham purportedly lived. He, like the later Moses, is almost certainly mythical, a character created to represent the beginnings of the Jewish faith. Even his names are symbolic. In truth, no one knows how Judaism began.

Onto Christianity:

The angel said to (Mary), “Don’t be afraid, Mary; God has shown you his grace. Listen! You will become pregnant and give birth to a son, and you will name him Jesus. He will be great and will be called the Son of the Most High. The Lord God will give him the throne of King David, his ancestor. He will rule over the people of Jacob forever, and his kingdom will never end.” (Luke 1)

Did this happen? If you believe angels exist then possibly, but we know they do not. We also know that this is myth. However, Luke wanted his readers to know that Jesus’ birth was miraculous so invented a story in which Mary encounters a heavenly being. The gospel writer anchors the divinity of Jesus to an implausible event which at best can only be a young woman’s vision (though it most certainly isn’t.)

The same is true of the resurrection appearances. Here’s Matthew 28:1-8:

Now after the Sabbath, as it began to dawn toward the first day of the week, Mary Magdalene and the other Mary came to look at the grave. And behold, a severe earthquake had occurred, for an angel of the Lord descended from heaven and came and rolled away the stone and sat upon it. And his appearance was like lightning, and his clothing as white as snow. The guards shook for fear of him and became like dead men. The angel said to the women, “Do not be afraid; for I know that you are looking for Jesus who has been crucified. He is not here, for He has risen, just as He said.”

More angels (they multiply in later gospels); again at best, though still highly improbable, the angel(s), if seen at all, can only be a vision or an hallucination (or mistaken identity.)

Onto the only first hand account of an encounter with the divine that the bible includes, Paul’s:

God was pleased to reveal His Son in me so that I might preach Him among the Gentiles… I want you to know, brothers and sisters, that the gospel I preached is not of human origin. I did not receive it from any man, nor was I taught it; rather, I received it by revelation from Jesus Christ. (Galatians 1)

I know a man in Christ who fourteen years ago—whether in the body I do not know, or out of the body I do not know, God knows—such a man was caught up to the third heaven. And I know how such a man—whether in the body or apart from the body I do not know, God knows— was caught up into Paradise and heard inexpressible words, which a man is not permitted to speak. (2 Corinthians)

This is all there is. This is the extent Paul talks about his heavenly encounters. In Galatians he admits that God revealing whatever it was he revealed was ‘in’ him, that is, in his own head. The bizarre tale he relates in 2 Corinthians reads like an hallucination (Paul says he doesn’t know whether it was in the body or out of it) which is all it could’ve been; there is no paradise or ‘third heaven’.

And finally, there’s Mohammed:

… while I was sleeping last night, the keys of the treasures of the earth were brought to me till they were put in my hand.”… 

The angel came to him and asked him to read. The Prophet replied, “I do not know how to read. The Prophet added, “The angel caught me (forcefully) and pressed me so hard that I could not bear it any more. (Sahih Bukhari 6998)

Encounters with heavenly beings in dreams, ‘revelations’, visions, hallucinations and invented stories: these are central to Judaism, Christianity and Islam. The religions would not exist without them. Written as myth long after they supposedly occurred or referred to obliquely by those who claim to have experienced them, they are the products of fevered pre-scientific minds.

Post-script: I’ve searched in vain for Darwin’s admission that an angel revealed the process of evolution to him. I can only find his collection of evidence, his scientific observations and his careful analysis of his findings. Likewise Mendeleev who calculated the existence of elements that were at the time unknown. Likewise Crick, Watson and Franklin who discovered the structure of DNA. Strangely, none of these people relied on visions, dreams or divine revelations in uncovering truths about reality.