It is all too easy to write from the mind, for that is what everyone does at school and at work. The rules for doing this are available in classrooms and in books.
It is also easy to do automatic writing. You simply hold a pen over a sheet of paper, let go, and let the writing flow from your unconscious.
You need a guide, however, when writing from the heart, because it is an art that harnesses your intuition and your emotion, and only a mentor who truly loves you can help you do that. When writing from the heart, your write not only from your present lifetimes but also from your past and your future lifetimes. When writing from the heart, your consciousness is the consciousness of love. No book or writing instrument, no matter how expensive, can bring you there on its own.