What Feelings How Do They Define Us And Why Do We Have Them?

Feelings how do they define us and why do we have them? We are taught in school that our arms, legs, and other body parts move because our brain send waves to make them do what we want them to do, if the brain couldn't send these signals we would be immobile. As a scientific fact the heart actually sends messages to the brain not the other way around for once.
Another fact is everyone has a opinion but those opinions could be chosen by how we feel, for example if a person has committed a crime a person who doesn't know them and read the facts says guilty but if it was a close friend who felt like they knew the person they would say “he/she couldn't have possibly done that it’s not in their nature” this is a way how emotions motivate actions. Cassie Bowman states that “feelings actually do motivate actions” she states “if I feel tired I yawn and go to sleep.”
When an emotion is triggered into the brain sent by the heart our nervous systems respond by creating feelings.
Emotions drives people’s actions whether it's anger, sadness, or even happiness people are blinded of their actions and surroundings when they’re in a emotion, for example in a book “After” written by Anna Todd's two characters fall in love and are always fighting each other and they are blinded how their fighting is hurting the people around them emotionally and sometimes physically (the boy had a