Yet if a person endures a thousand hardships yet never alters their original aspiration, and is able to maintain good intentions in every thought, they are a true immortal or Buddha. Therefore, a good person still needs to be tempered by the "Eighty-One Tribulations."
Yet one might ask: in this world, who can maintain good intentions in every thought? Good and evil thoughts simply alternate within the human heart, which is why "a single thought can lead to heaven, and a single thought to hell."
So that is how it is.
Chapter 199