If a plane flies off course or a car veers carelessly off the road, it can easily have an accident or fail to reach its destination. Similarly, if our lives go off course, we, too, can crash, plunging into misfortune and misery. Though it may not be visible to the eye, there is a path or course in life. A path leading to absolute happiness exists without a doubt—and that is the path of the Mystic Law.
From The Wisdom for Creating Happiness and Peace, part 1, revised edition, p. 319

Daisaku Ikeda

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