To use the struggle against illness to develop an even greater sense of fulfillment and inner richness is to lead a life of value creation. That is why it is so important to have the “heart of a lion king” with which to fight through to the end against all obstacles. We must possess an indomitable and unyielding spirit. It is for this very reason that we need to exert ourselves in faith and practice every day, chanting Nam-myoho-renge-kyo for both ourselves and others, and forge a strong determination grounded in faith that will remain steadfast and unwavering in the face of any attack by the devil of illness.

From The Wisdom for Creating Happiness and Peace, part 1, revised edition, p. 259