Nichiren used Jofukyo bosatsu as an example because Jofukyo bosatsu which appeared in Hokke Monku prayed for people with his whole heart without disdaining them even if he was slandered by them.
そこに登場する常不軽菩薩が人々から誹謗中傷されても、常不軽菩薩自身は人々を軽んぜず、一心に礼拝したことである。