There must be a certain ethical maturity before a man will even be willing to listen to such a teaching, and there must be a certain intellectual maturity before he will be able to learn it. There must be the will to analyse, the capacity to take an impartial attitude, the strength to renounce the vulgar view of things, and the desire to travel the road of truth inexorably to its last and logical conclusion. The fount of seeking must not be consciously or unconsciously muddied by selfish motive. It is not suggested that these preliminary qualifications must be present in their perfection and fullness--such will be the final result and not the first attempts on the quest--but that they should be present to a sufficient degree to make a marked disciplinary contribution to one's inner life.
-- Perspectives > Chapter 1: Overview of the Quest > # 30
