First, to produce art, the artist apparently needs a creative imagination and that there be some inner state that can be manifested in the work of art. The soul is both a capacity (creative imagination) and an expressible content, a form of subjective self-awareness and a psychological life. Art is about creating order out of disorder. Art is about connecting with the reader's heart and soul. You must do what James Baldwin said and relentlessly pour every last drop, sweet or bitter, into your work.
That way, you'll produce something incredible that's totally your own and everyone else's. It produces a legacy that will stand the test of time.