To purify the soul, faith and practice is foremost.
Through the practice of faith and practice, which begins with chanting the Odaimoku and the sutra, our soul is naturally purified. The original light of our soul naturally appears and strength wells up from within us. When this happens, we become active as though being driven by something. And it joints with the path of happiness for human life.
That is why we first earnestly devote ourselves to faith and practice.