Mind/brain is mysterious.
There are some, who have studied it extensively from the hardware point of view, like scientists, doctors, neurosurgeons.
They talk about neurons, synapses, neuro-peptides, firing of neurons, brain chemicals…
Some say mind is in the brain, some say it is throughout the body, as well as outside it, related to consciousness.
Some have studied its functionality from the outside, its effects.
We, general people, just have to just take it for granted !
We come into this world without any information, we learn from our immediate environment, people, school, college, books, internet, etc.
Despite that, some important life changing information is left out.
Results is the name of the game !
Have faith. Keep learning.