I hear this term in the spiritual realm. What does it mean?
Ability to see through someone’s bullshiet.
pineal grand .
A parietal eye, also known as a third eye or pineal eye, is a part of the epithalamus present in some vertebrates. The eye is located at the top of the head, is photoreceptive and is associated with the pineal gland, regulating circadian rhythmicity and hormone production for thermoregulation.
What does the Bible say about pineal gland?
[ul]
[li]What does the Bible say about pineal gland? We can now say that the light of the pineal gland is associated with God’s face! In other words, it is symbolic of experiencing the light of God beyond the physical plane of the five senses. And somehow the physical pineal gland is a doorway of sorts to a higher reality.[/li][/ul]
[SIZE=5][B]Does[/B] the [B]pineal[/B] [B]gland have any spiritual significance[/B] …[/SIZE]
www.thegatheringbaltimore.com/2021/04/14/what-can-affect-the-pineal-gland/
What are the functions of pineal gland?
[ul]
[li]Secretion of the hormone melatonin[/li][li]Regulation of endocrine functions[/li][li]Conversion of nervous system signals to endocrine signals[/li][li]Causes sleepiness[/li][li]Influences sexual development[/li][li]Influences immune system function[/li][li]Antioxidant activity[/li][/ul]
[SIZE=5]The Function and Location of the [B]Pineal Gland[/B][/SIZE]
www.webmd.com/sleep-disorders/what-to-know-about-calcification-of-the-pineal-gland
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Such an eye opener.
I recall during the pandemic how the Covid crowd really went wild about the pineal gland. 
Case Closed!
There’s a rock song called Third Eye Blind