What we call life is known as “external” and “internal” stimuli. ‘External stimuli’ are things you experience (like hearing a joke) and ‘Internal stimuli’ is how your brain responds to said experience (like laughing at the joke). Your brain releases a potent concoction of chemical like serotonin, dopomine and oxytocin. This chemical release tells you how to feel (Good, bad or in-between).
When you get the chills, your body is responding to a sharp degree of stimulation. When you feel fear, joy, cold..etc the physical goosebumps (called piloerection) is the same but the phyiscal feeling (Brains special concoction) is not always the same, so it’s partially identical but never absolutely.
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