What is the theme in Temple Bells Die Out by Matsuo Basho?

Nature is a theme in this book. Haiku often contains "season" words, called kigo, that signify a time of year. Japan was an agricultural society in the seventeenth century, and its people were attuned to changes in the seasons and the rhythms of nature. Most of the kigo in Japanese haiku refer to plants. The "fragrant blossoms" tell readers it is spring or summer, evoking a sense of vitality and well being, and the feeling of being one with nature, both essential features of Basho¯'s haiku.