Dreams are illustrations from the book your soul is writing about you what play is this from?

I have read this phrase frequently on the internet on several pages, but can't find an answer to this question. The sentence was sent to me in a text message, along with the writer name, Marsha Norman. I thought it was a advertisement for a new book by Ms Norman, but can't find any publication by the name "Dreams are Illustrations.........:. I'd really like to know the origin of this quote. If it's a book, where can it be obtained?