Narayana Krsna Dvitiya
"By performing devotion, one will not develop conceit; rather, humility will come.
If someone who is not eligible hears discourses about the Lord and studies Vedas and other scriptures, then his studies and his performance of devotional practices is just for the sake of ego. And in case of devotees, these same activities will make them very meek, humble, simple; their dealings will be sweet.
That there was a Buddhist person, guru. He was in the age of eighty. There was a mountain, and in that mountain there was a very deep cave. And he went inside. And he told his disciples to put a very heavy stone on the mouth of that cave. And there was nothing, no food, no air, no water, nothing there...