Truly, in order to attain Buddhahood we must serve a teacher without fail. In fascicle four of the Annotations on the Great Concentration and Insight, Grand Master Miao-lê points out: “If there is a disciple who finds fault with his teachers, whether it is true or not, his mind will be ruined and he will lose the merit of the Dharma.”
Minobu-san Gosho, Mt. Minobu Letter, Writings of Nichiren Shōnin, Volume 5, Page 126-127