You sing every day, guru-mukha-padma-vakya, cittete koriya aikya. That is the process. Wherever you live, if you follow strictly the instruction of guru, then you remain perfect. But if we create, concoct ideas against the instruction of guru, then we are gone, hell. Yasya prasadad bhagavat-prasado yasyaprasadan na gatih kuto ‘pi. There is no more shelter — finished. Yasya prasadat. If guru thinks that “This person, I wanted to take him back to home, back to Godhead. Now he is going against me. He is not following,” aprasadat, he is displeased. Then everything is finished.

(Srila Prabhupada — February 3, 1975, Honolulu)