Dressing in rough and dirty garments, letting your hair grow matted, abstaining from eating any meat or fish, does not clean the one who is deluded.
Mortifying the flesh through excessive...
The purpose of Zen is to enable people to immediately transcend the ordinary and the holy, just getting people to awaken on their own, forever cutting off the root of doubt.
Many people in modern times disregard this. They may join Zen groups, but they are lazy about Zen study. Even if they achieve concentration, they do not choose real teachers. Through the error of false teachers, they likewise lose their way.
Without having understood senses and objects, as soon as they possess themselves of some false interpretation they become obsessed by it and lose the correct basis completely.
They are only interested in becoming leaders and being known as teachers. While they value an empty reputation in the world, they bring ill on themselves.
Not only do they make their successors blind and deaf, they also cause the influence of Zen to degenerate.