The Zen way of calligraphy is to write in the most straightforward, simple way as if you were a beginner, not trying to make something skillful or beautiful, but simply writing with full attention as if you were discovering what you were writing for the first time; then your full nature will be in your writing.
Zen Mind, Beginner's Mind (ed. Shambhala Publications, 2010) - ISBN: 9780834821293