"The defining characteristic of bodhisattvas is their vow. The vow of the Bodhisattvas of the Earth is to propagate the Lotus Sutra. That's why it is important for us to chant Nam-myoho-renge-kyo with this vow for Kosen-rufu, resolving with all our hearts to help those around us evoke genuinely happy. From a strict point of view, chanting Nam-myoho-renge-kyo without that vow is not the prayer of Bodhisattvas of the Earth." The vow for kosen-rufu brims with the powerful life force of the Buddha, which can vanquish all negative influences.
[ CL-Aug-2018, page 30 ]