About the enso
The ensō (円相, "circle form") is painted with a single stroke of the brush, in one breath, and never retouched. In Zen it stands for the moment when the mind is free to let the body create: enlightenment, the universe, emptiness, and the beauty of the imperfect. Monks and calligraphers have painted one a day as a practice.
Some are closed, a full circle. Many are left open, a gap where the brush lifts: a sign that nothing is ever complete, and that there is room for something more. The dry, broken end of the stroke, where the ink runs out, is called kasure and is part of its beauty.
Each enso is drawn as a bundle of bristles that lose their ink at different rates along the stroke. The seal reads 円, "circle".