Japanese calligraphy was influenced by, and influenced, Zen thought. For any particular piece of paper, the calligrapher has but one chance to create with the brush. The brush strokes cannot be corrected, and even a lack of confidence shows up in the work. The calligrapher must concentrate and be fluid in execution. The brush writes a statement about the calligrapher at a moment in time (see Hitsuzendō, the Zen way of the brush). Through Zen, Japanese calligraphy absorbed a distinct Japanese aesthetic often symbolised by the ensō or circle of enlightenment.