The vow for kosen-rufu brims with the powerful life force of the Buddha, which can vanquish all negative influences. Shin’ichi wanted every single member to enjoy great benefit. He wanted them to overcome illness, financial hardship, and every other kind of adversity and become truly happy. Their prayers to triumph over such obstacles needed to be infused with a vow for kosen-rufu.
From The Wisdom for Creating Happiness and Peace, part 3, revised edition, pp. 52-53
Daisaku Ikeda