What is important is to have the feeling “That person is suffering, I want them to be happy” and also to talk about Buddhism with those around you from time to time. Even if the person you’ve been talking with doesn’t take faith right away, as long as you maintain a strong unwavering wish for their happiness and a sincere spirit of friendship, the time will definitely come when they will awaken to Buddhism.
From The Wisdom for Creating Happiness and Peace, part 2, revised edition, p. 270

Daisaku Ikeda

Why does Nichiren Daishonin place so much importance on propagation? It is because the great path for each practitioner to attain enlightenment in this lifetime lies in actively striving to spread Buddhism with the same vow for kosen-rufu as Nichiren Daishonin himself.
>From The Wisdom for Creating Happiness and Peace, part 2, revised edition, p. 272

Daisaku Ikeda

Chanting Nam-myoho-renge-kyo is fundamental to this, enabling you to reveal your innate Buddhahood just as you are. Not only will chanting give you a wonderful, fundamental self-confidence, it will also adorn and dignify your life with the brilliance of your true and highest potential. Please have absolute confidence in yourself, because you are living the noblest possible life, with a beautiful heart.
>From The Wisdom for Creating Happiness and Peace, part 1, revised edition, pp. 207-08

Daisaku Ikeda