People say “Pursue your passion.” Is such passion coming from the soul or the mind?

From Sudheer P

Many people will say ‘follow your heart’, ‘You have to pursue your own passions what your inner voice says’. I want to know what is that inner voice or passion of the heart. Are those words are given by the soul or just feelings by the modes of material nature. or can those statements can be true in any sense. please tell some few words regarding this.