Zen art expresses the inexpressible as it helps to transform the way we see ourselves in the world. It is both the ultimate statement and the beginning of the journey all at once. The form of the circle is iconic to the formation of many languages, be it as a symbol for the moon, the sun, the wheel of reality. Known as the ensō in Japan, it is the most common subject of zen calligraphy. Its essence can be difficult to grasp.