Kanji written in the image “Keep yourself firmly centered inside here and nothing will be able to shatter you” with the kanji of “heart” inside the ensō.
The ensō, also called zen circle, is a symbol of teaching, reality, enlightenment, and a myriad of things in between. Seemingly perfect in its continuity, balance, and sense of completeness, and yet often irregular in execution. An ensō is both the most fundamentally simple and the most complex shape.
An ensō evokes power, dynamism, charm, humor, drama, and stillness.