This is a pretty straightforward statement.
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49:5:19 3. Spirit-reception series. There are three groups of mind design as related to contact with spirit affairs. This classification does not refer to the one-, two-, and three-brained orders of mortals; it refers primarily to gland chemistry, more particularly to the organization of certain glands comparable to the pituitary bodies. The races on some worlds have one gland, on others two, as do Urantians, while on still other spheres the races have three of these unique bodies. The inherent imagination and spiritual receptivity is definitely influenced by this differential chemical endowment.
There aren't too many pairs of glands. We have salivary glands, testies/ovaries and adrenal glands. I looked over the functions of each and I'd say the adrenal glands are the main suspect. They produce cortisol, adrenaline and dopamine among other things. They even get their signals from the pituitary gland.
Dopamine is an interesting one while thinking about spirit reception:
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Dopamine is known as the “feel-good” hormone. It gives you a sense of pleasure. It also gives you the motivation to do something when you’re feeling pleasure.
Dopamine is part of your reward system. This system is designed, from an evolutionary standpoint, to reward you when you’re doing the things you need to do to survive — eat, drink, compete to survive and reproduce. As humans, our brains are hard-wired to seek out behaviors that release dopamine in our reward system. When you’re doing something pleasurable, your brain releases a large amount of dopamine. You feel good and you seek more of that feeling.
An interesting study about meditation and the release of dopamine. https://www.sciencedirect.com/science/a ... 1001001069
Also a correlation https://headhearthand.org/blog/2019/01/ ... -dopamine/
Anyone have any thoughts?