心の欲する所に従えども矩を踰えず

こころのほっするところにしたがえどものりをこえず

expression

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following the desires of one's own heart without transgressing what is right(idiom )(from the Analects of Confucius)

心	heart, mind, spirit, heart radical (no. 61)
欲	longing, covetousness, greed, passion, desire, craving
所	place, extent
従	accompany, obey, submit to, comply, follow, secondary, incidental, subordinate
矩	ruler, carpenter's square
踰	go beyond