Spiritual writers often feel as if they're taking dictation. It is as though their thoughts have a life of their own and the mind is merely a receiver. Although I sincerely doubt that Gandhi or other notables have authored as many channeled books as people have been claiming, truly spiritual writing does have an other-worldly feeling and can often teach the writer things he or she would otherwise not have known. Writing opens you up to new perspectives, much like self-induced psychotherapy. Although journals are the msot direct route for self-evaluation, fiction and nonfiction also serve as vehicles for a writer's growth.
Writing helps the mind expand to the limits of the imagination.
Anyone can become a spiritual writer. There are many benefits from doing so, not the least of which is the development of your soul. On a more practical level, it is much less difficult to write with flow and fervor than it is to be found by the limitations of logic and analysis. If you tap into the universal source, there is no end to your potential creativity. The greatest barrier to becoming a spiritual writer is the human ego.