You say, "...but we must realize that the supernatural realm (and supernatural entities therein) is a delusion."

Is cognition itself a delusion? Are spoken words not entities?

Entity defined: 1A thing with distinct and independent existence.

Cognition defined: 1The mental action or process of acquiring knowledge and understanding through thought, experience, and the senses.

Logos from greek meaning thought, word, reason

You are using your cognition to read these words?

above; over; beyond.
"superlunary"
to a great or extreme degree.
"superabundant"
extra large of its kind.
"supercontinent"
having greater influence, capacity, etc. than another of its kind.
"superbike"
of a higher kind (especially in names of classificatory divisions).
"superfamily"

John 1:1 ... the logos was with God and was God.

We can naturally observe words with our cognition, logos capabilities. However, we could also understand that it requires a "realm" in which this cognition capability exist. It requires a special higher state of energy such as what is required to bring about a brain structure so that these "super" capabilities can function. Words, cognition, thinking capabilities is a supernatural entry. It can be observed that it requires a higher realm of energy state to exist. Cognition is the "super" of natural things and entities. What is anything if it foes not have cognition?

@Word What I said: "Humans do need myths, though. That's part of being human, but we must realize that the supernatural realm (and supernatural entities therein) is a delusion."
We need the fiction and the non-fiction, but we must realize that only one really exists. We need imagination, but there is only one place it can actually apply and that is in the world of non-fiction.
Cognition? That's what the brain does. It's purpose is to survive.
GROG

@GROG First, for you to say," but we must realize that the supernatural realm (and supernatural entities therein) is a delusion." Would be a rather unfounded, unsupported and illogical statement.

Then you say, "We need imagination, but there is only one place it can actually apply and that is in the world of non-fiction." I think people can infact have imaginations about things that are nonfiction.

As apart of our cognition or thinking ability we can use our thoughts to imagine real, true things, it is not required that are thoughts are only relegated to imagine nonfiction. Otherwise, please give better clarification to what you mean.

Lastly, you say,"Cognition? That's what the brain does. It's purpose is to survive." Yes, correct basically generally speaking, but let me point to brainless cognition. A brain is not required for something to think or cognate.

[scientificamerican.com]

How Brainless Slime Molds Redefine Intelligence [Video]
Single-celled amoebae can remember, make decisions and anticipate change, urging scientists to rethink intelligent behavior

By Ferris Jabr on November 7, 2012