We all have our own problems and sufferings. To surmount them, it’s important to have the determination to do so for the sake of kosen-rufu. If we are suffering from illness, for example, then vowing to overcome that illness and gain the strength and life force we need to freely take action for kosen-rufu and demonstrate the validity of Nichiren Buddhism to others will become a tremendous impetus for our recovery.

From The Wisdom for Creating Happiness and Peace, part 3, revised edition, p. 52