heart or mind?  

I think you have to use 80% of mind & 20% of the heart.It depends on the situation to make some decision but the best is think it 6x before it arrive to a decision & balance it with 20% of the heart decision.

Heart is driven by emotional desperation and Mind harness the heart imposing the perpetual possibility of terrible consequences.But emotion has greater impact on human than the confusing complexity of logical mind.What mind imposes is fear which sometimes stops us from taking even the first step.That never helps.There is always a trade off between listening to heart and listening to mind and yes,it depends on the importance of the event.I think,in professional affairs you'd listen to your mind,but in personal issues you'd listen to your heart.

I actually tend to use my mind more, even over-analyze things rather than listen to my heart first. But as much as I can, I still try to keep things in balance before arriving to a decision that I might regret. I wouldn't want to follow just what my mind thinks because I might end up unhappy, or only follow my heart because it may not be wise.

The minds like the accelerator pedal of the car while the heart as the brake. The mind leads us to where we want to be and the heart helps us avoid any accident. When I have to pay for our electricity consumption for February I traveled by bus toward a nearby city because we only live in a town. When the journey is about 9/10 of the total distance my feeling became uncomfortable and my sweat became cold. I thought I would die on the bus. To save myself from death I used my mind to think of a way to make myself feel better. My mind suggested thinking of a girl who cares for me and that lessened the nausea. I asked for more suggestion and soon I opened the window of the bus and raised my left leg to improve blood circulation. I was lucky the bus had already reached the city and no more triggers my dizziness. I recovered and thanked my mind for giving tips. I believe the heart played a role as well because I was so fast with opening the window and was so kind and concerned of myself because I might die any minute on that bus. It also helped to say briefly 'help me God'. So I believe both heart and mind must go together and not one of them must be ignored.

Hey careguarden! I have definitely regreted not following my
instincts, whether it was my heart or my mind! Sometimes we
let our feelings cloud our minds and sometimes we let our
minds cloud our feelings! I don't know which is worse! And
I don't know which is the best way to make a decision! Sometimes
for me I think to much and that ends up being a mistake! You
can really overthink things and then still make the wrong
decisions!