The brain receives outside stimulus (messages from different sources) and is in charge of putting it together in ways that tell you (itself) what’s going on. It can interpret the information however it wants, but usually has patterns and connections it learned and/or always had that it uses, which is how most people experience being alive.
It can forget any source of stimulus by having physical intervention (getting a bad owie) or by itself to protect you (itself) from getting hurt, on the inside (your conscious existing being) or from remembering inside or outside (your/its body) things that hurt.
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