heart: --> Do things suite me or not, am I comfortable or not, ne mattaer what analysis of the conjenctur is. So we are talking about feelings, or emotions in principle.
Mind: --> How things work, what are the possibilities of so and so, it has to do with analysis of the certain conjencture at hand.
To have a disconnect between the two, the analysis of the conjencture should lead to states that are then weighed in terms of their relevancy to me or not.
According to one theory, there is a difference of time scale between our emotional and the rational sides of us. Emotions, or feelings are very fast.
The widespread wisdom asserts that a wise man (or woman) is the one who acts or base his/her actions upon thinking rather direct, superficial feeling. But this deprives us from being spontaneous creatures, and may lead to one becoming very cold :)
Emotions, feelings pertain to what things should be, while things pertains to how things are. The conflict is there.