 In his seminal treatise, Enjoyment Visible and Invisible or Ken’yū rakuron, completed in 1867, Ariyo argues that these deities should be revered, worshiped, and served not only during one’s lifetime, but even after death when people become spirits dwelling in the otherworld. Ariyo encourages people to live life with a positive outlook and to embrace enjoyment both while on earth and also in the afterlife.