It is said that the merit of all the Buddhist scriptures (except the Lotus Sūtra) is found in the promise that men can become Buddhas after they have done good deeds, which means the attainment of Buddhahood is not certain. In the case of the Lotus Sūtra, however, when one touches it, one’s hands immediately become Buddhas, and when one chants it, one’s mouth instantly becomes a Buddha.
Ueno-dono Gozen Gohenji, Reply to My Lady, the Nun of Ueno