Is your gut the arbiter of your life?

What part of your body makes the final decision? Your heart? Your head? Your gut? What happens when you have conflict between these various body parts? I know it's situational and different parts weigh in more depending on the situation. Buying cereal, buying a pair of shoes or staying with someone you love are different emotional decisions. Cereal, maybe not a life changing decision but even cereal can be an emotional decision though maybe on the lowest level. Your head may come into play here. Buying shoes ups the emotional anti. How will they look, do they match anything I have, how expensive are they, how will I feel wearing them? The head and heart play large rolls here. Now for the big one, if you love someone who brings you joy, laughter, happiness and shows you a side of yourself that you haven't felt in a long time yet your gut tells you that it isn't long term, what body part prevails? The heart tells you that you have found the right person. Your head may tell you that as great as it is more time may be needed to fully evaluate what the heart is telling you. What happens when you've found the love of your life but your gut tells you it won't last? What do you tell this person? What can you tell this person? Can you tell this person that they should follow their heart-it is the largest organ in the body so it should carry more weight. Happiness respect joy honesty and laughter is a hard combination to come by and to let it go because of a gut feeling seems like a decision a person would soon regret and the other person would have a difficult time understanding and emotionally accepting.