From The Writings of Nichiren Daishonin, Volume 1:
President Toda's constant guidance to the young women was, 'Become happy!' That encapsulates the very essence of why we practice this Buddhism. Then how can we secure this state of absolute happiness? Nichiren Daishonin revealed the way to do so and that is 'by chanting daimoku to the Gohonzon.' Surely nothing could be simpler. There is no greater philosophy or Buddhist teaching than the Daishonin's, which enables all people to attain happiness."
"You who possess this lofty, noble philosophy are the women who will lead the next era. You all must strive to become capable of doing so. As daughters and disciples of Nichiren Daishonin, as pioneers of the Daishonin's Buddhism, you all have vital roles to play in spreading its teachings, in bringing happiness to our friends across Asia and throughout the world. I hope you will be deeply aware of your noble mission and continue to further your understanding of Buddhism through study...The study of Buddhist philosophy serves as a guide for our practice of faith.
Human emotions are subject to change. And an intense passion for faith may sometimes cool; determination to practice may waver. That is when the study of Buddhist principles illuminates the path of faith along which we should proceed." (The New Human Revolution, vol. 5, "Victory" chapter)