It can be a point of arguement that at what base we take decisions, d mind takes d lead role or d heart. After much thinking & research, i got an answer that mind only argue on any matter but heart takes d decision on d basis of arguement made by mind & successful decisions taken in d past. i.e. Heart has a full record of successful & fail incidents occurred in d past & on that basis it takes decisions. Making it more clear i can say that- In d starting it takes decision on d basis of what others (our close relatives & by books) have told 2 do in that condition.Heart applies this approach 4 present & future problems in same condition untill it becomes fail in any particular condition. after failer of this approach, heart orders mind 2 search 4 alternate method & after finding alternate successful method, heart stores it as a default method 2 apply in that case in future. thus it renews it's default setting same as a program on computer...