Just as no crooked tree exists on a mountain of treasures and no corpses remain in an ocean, the dead bodies of slanderers of the True Dharma will never be accepted into the ocean of Buddhism nor will the twisted trees of icchantika ever take root on the treasure mountain of the one-vehicle teaching. And yet the shards and broken tiles of those who committed the five rebellious sins (killing one’s father, killing one’s mother, killing an arhat, injuring the Buddha’s body, and causing disunity in the Buddhist order) and the polluted water of the four major sins (adultery, stealing, killing a person and telling a lie about his spiritual attainment) are allowed to enter the ocean of Buddhism and the treasure mountain of the one-vehicle teaching. Therefore, those who study Buddhism, wishing to be better off in the next life must be careful not to commit the sin of slandering the Lotus Sūtra.

Shuju Onfurumai Gosho, Reminiscences: from Tatsunokuchi to Minobu, Writings of Nichiren Shōnin, Biography and Disciples, Volume 5, Pages 43