Yama is saying that the enlightened master has to be a srotrie brahmanist. And with such a master, enlightenment is inevitable,. You will become enlightened. Mavakes are not mantras which are used for repetition. Once you realize i am not this, what we are is directly manifest. We are not seeing it because we have locked ourselves into thinking these things. Be patient for the self to reveal itselfr from teachers to student.