The word “莫妄想 (Maku mōzō)” means don’t think about anything else. When there are two opposing sensible minds, delusion is the mind that seeks one even though it has abandoned the other. If you are not bound by either of them and have no delusion, you are enlightened as you are. It is said that Fenzhou Wuye (760-821), a disciple of the Tang Dynasty Chinese high priest Mazu Daoyi, recited this phrase throughout his life, and it was a popular Zen phrase in the Tang Dynasty, During a Zen dialogue, a zen master responded to a monk’s question with these words.
The signature of this Bokuseki (Calligraphy) of Fuyō indicates that was made during his period of residence priest at Kōshōji Temple (1787-1798).