It has been 2,200 years or so since the passing of Śākyamuni Buddha. We are now in the Latter Age of Degeneration, when wise persons are gradually getting scarce just as a mountain slopes from the peak and fields are overgrown with weeds. Many people chant the nembutsu or observe precepts but few seek refuge in the Lotus Sūtra. Stars are many in number, but they cannot illuminate the depths of the ocean. No matter how many plants there are, they cannot be used as pillar for a palace. Likewise, no matter how many times one chants the nembutsu, it will never become the way to Buddhahood. No matter how many precepts one observes, they will never become the seeds of rebirth in the Pure Land. The seven characters of Namu Myōhō Renge Kyō alone are the seeds of Buddhahood.

Kurōtarō-dono Gohenji, A Reply to Lord Kurōtarō, Writings of Nichiren Shōnin, Faith and Practice, Volume 4, Page 153