Battle of Heart and Mind

My heart (may be my conscience) tells me that I am wishing for it and just go for it. And my mind says ‘No’, argues that I don’t wish for it and some other is more apt for me.” I agree that "Heart" never lies. But what if 'it' is completely unknown? "Heart" remains silent? Will it be always silent in such circumstances? If the answer is no -

Though both the heart and the mind don’t know which choice is the better, they just fight with each other to win the argument. Perhaps, it is not always easy to give rational explanations, particularly in the case of likes and dislikes.

For a long time my mind is almost winning, sometimes by convincing the heart and most of times ignoring it. Well, at the same time, heart has also never given up the battle. Whenever possible it’s arguing with my mind again and again. May be by ignoring the heart forever makes it to forget about its wish. Is this right or wrong still a big question mark?

There is also a possibility that some day my mind may succumb to my heart. Even then I may not have any rational justification of the winner. Sounds strange!

I wonder why we need both the heart and the mind. Why this dual and duel? May be the answer lies by making both of them as one. I have to figure it out.