The Exorcistis one of the most iconic horror movies of all time.

Fans of the horror genre would be remiss if they didn’t watch the film at least once.

Even though nowadays we’re used to horror movies containing ridiculous premises,The Exorcistcontained a remarkably logical story.

Sara is giving a blanket stare in Exterritorial

It’s as straightforward a plot as that.

In the book, it serves as an omen for Father Merrin.

However, the book goes far more in-depth as to why this is happening.

Padme to the left, Palpatine/Darth Sidious in the middle/background, and Obi-Wan Kenobi and Anakin Skywalker to the right, all from Revenge of the Sith

She ends up dying alone with no one around to help her.

The landlord of the building ended up finding her body and reporting it.

This fact, understandably so, haunts Karras during the exorcism.

Jason Bourne looks on in The Bourne Identity

In the movie, it just serves as another terrifying example that something is wrong with Regan.

In the book, the scene is a little more drawn out.

Regan pretends to be a snake, hissing and snapping at the ankles of the adults around her.

The Exorcist feature

There’s something about Blatty’s writing that makes this moment sound worse than it was in the movie.

She’s going through a tough time, and no one seems able to help her.

She took Regan to so many doctors, and they couldn’t point out what was wrong.

Desert scene in The Exorcist

Regan had been experiencing the effects of her possession formonths.

No wonder Chris was at her wits' end.

They are both huge movie fans, and Kinderman in particular is a cinephile of the highest order.

Father Karras from The Exorcist

Is it just around to cause evil?

Did it want to corrupt Regan?

The book heavily implies that the demon’s ultimate purpose is to end Regan’s life.

Regan’s spider walk from The Exorcist

It tries to do this by keeping her awake, not letting her get a decent night’s sleep.

If a human body goes without sleep for a while, death is the eventual result.

As such, the priests were truly fighting for Regan’s lifeas well as her soul.

Chris MacNeil from The Exorcist

However, the ending in the book is happy in regards to matters of faith as well.

Throughout the whole book, Karras was going through a crisis of faith.

Doubt plagued his every step.

Regan MacNeil from The Exorcist

Logically speaking, Merrin succumbed to ailments of the body during a strenuous exorcism.

However, fans often speculated whether or not the demon had a hand in Merrin’s death.

The book clears up the subject a lot.

Detective Kinderman from The Exorcist

It confirms that Merrin died of a heart condition he was suffering from.

As a matter of fact, the demon was mightily displeased that Merrin died in that manner.

It viewed his passing as the ultimate form of quitting.

Exorcism from The Exorcist

It was a strange form of revenge on the demon’s part.

Detective Kinderman has to solve this mystery on his own inLegion.

NEXT:5 Horror Movies Scarier Than The Book (& 5 Books That Are Still More Frightening)

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Father Merrin holds a bible in The Exorcist

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