The heart of the great vow for kosen-rufu and the life state of Buddhahood are one and the same. Therefore, when we dedicate our lives to this vow, we can bring forth
the supreme nobility, strength, and greatness of our lives. When we remain true to this vow, the limitless courage, wisdom, and compassion of the Buddha flow forth from within us.

From The Wisdom for Creating Happiness and Peace, part 3, revised edition, p. 531