one precaution is necessary, failing which it were better to leave untrodden all steps on the path to higher knowledge. It is necessary that the student should lose none of his qualities as a good and noble man, or his receptivity for all physical reality. Indeed, throughout his training he must continually increase his moral strength, his inner purity, and his power of observation.
“An elementary and formal secrecy is requisite as a practical precaution against the intrusion of improper persons and for preventing profanation. In other respects the vital secrets of life, and of any system expounding life, protect themselves even though shouted from the housetops, because they mean nothing to those as yet unqualified for the knowledge and unready to identify themselves with it by incorporating it into their habitual thought and conduct.” [via]