Look at the world around us. There are many who say they have deep faith, but there is not one person in 10,000,000 who is sincere. The Nirvana Sūtra says: “Those who do not have faith in the Buddha Dharma and fall into evil paths are as many as the dirt on the earth; those who have faith in the Buddha Dharma and become Buddhas are as few as the amount of dirt piled on a fingernail.”
Minobu-san Gosho, Mt. Minobu Letter, Writings of Nichiren Shōnin, Volume 5, Page 129