Heart over mind or Mind over heart?

Such a complicated phrase. why is the mind created to think? and the heart to feel? why can't it be the other way around or both? that i do not know.. so many questions yet the solutions are scarce.. I never thought that this simple and complicated phrase can also be applied to life.. life has its own challenges and there are certain things that the mind has to decide upon though the heart can also be affected by it.. some would say "Follow your heart" but what if, following your heart might just lead into something bad? what if following also your mind causes your heart to feel numb? so hard.. yet we have to choose one.. and choosing is the hardest task.. but sooner or later we will... a good friend of mine told me that we don't have to choose between the two but to overcome and to try to make a solution to everything.. and i thank god i have a friend like him who readily listens whenever i need someone to talk to... the optimistic part of me still convinces me to be strong as i have always been but the circumstances surrounding me is pushing me down to the ground.. in due time... i know i will redeem myself...