Most people usually associate feelings with heart and logical thinking with brains, though not a single scientist has yet proved it. So no wonder why we say that our heart and our brain are fighting when we face another strong emotion such as sympathy, hatred, jealousy and other disasters the strongest of which is, of course, love. You might have already witnessed a typical conflict between your rational and emotional sides, but anyway this battle will be a curious thing for you to see. Enjoy!