Shri Mataji says she was the one who came as the serpent in the Garden of Eden and caused Adam and Eve to eat from the fruit of the "Tree of the Knowledge of Good and Evil."
In the Gnostics Bible it has come out what I’ve been saying, that Adam and Eve, both of them were like pashus, under the complete control of God – no free will. They would have lived in the nude in the garden of Eden, would not have even thought of knowing anything more than that, but to eat, live like animals. They were just like animals. Then it is the Shakti itself took the form of a snake, and went and told them that “You must have the fruit of knowledge.” She wanted to evolve. That was not the idea of God Almighty, because it’s quite a headache, you know, to do such a thing. He thought, “What is the need to have such headaches around Me?”
But Shakti knew Her own style. She knew that She is capable of lots of miracles, and She can make these human beings understand the knowledge, and She can really make them knowledgeable. So She said, “You must eat this fruit, and you must try to know the knowledge.”
Source: [1]
Shri Mataji came as the serpent into the Garden of Eden and initiated the fall of man. Biblically speaking, she is therefore Satan.
From Genesis Chapter 3:
God punishes the serpent.
From Genesis Chapter 3 Verse 14:
There is enmity between the man and the serpent
Genesis 3:15:
Jesus uses the symbol of the serpent to describe the evil spiritual forces of the enemy:
Luke 10:19 (Jesus' words to the disciples):
I believe the symbol of the serpent is used because the main weapon of Satan is the lie. There is a lot of fraud in this world. For example, sometimes you get emails saying you have won a lot of money and should send your bank details. The price here is money. Wherever there is a price, there is fraud.
If there is an invisible spiritual world and there is war there between good and evil spiritual forces, is it not very likely that there is also fraud here for humans? So, that we are enticed to worship some gods which probably are none, and to generally follow spiritual paths that may look good and feel good but do not come from God and therefore cannot do any good either? The price here is much higher than money.
But this line of argument makes no sense if you believe in Hinduism; it only makes sense if you believe in the Judeo-Christian God (it would also make sense in Islam).
[1] 1st Day of Navaratri, 10th Position, Cabella Ligure (Italy), September 27th, 1992.
https://www.amruta.org/1992/09/27/navaratri-puja-1992/