You should know that the merit of the Lotus Sūtra is the same whether you chant the whole eight scrolls or just one scroll, one chapter, one stanza, one phrase, one character, or the daimoku. For instance, a drop of ocean water contains the water of numerous rivers, large and small, while a wish-fulfilling gem produces numerous treasures. In this sense, a drop of ocean water is the same as numerous drops and a gem is the same as numerous gems. One character of the Lotus Sutra is like this one drop of ocean water or one wishfulfilling gem. Numerous characters of the sutra are like numerous drops of ocean water or numerous wish -fulfilling gems.

Gassui Gasho, A Letter on Menstruation, Nyonin Gosho, Letters Addressed to Female Followers, Page 28