It is necessary to pronounce certain words of caution to the novice in meditation. He is trying to penetrate the unknown parts of his being with a vehicle not only fashioned by himself but also fashioned out of himself. If the material is defective or the method inaccurate, the result will be disappointing and may even be harmful. Moreover, the journey itself is beset with certain risks and dangers for the man whose emotions are undisciplined, whose passions are ungoverned, whose ambition is to exploit other persons, whose critical judgement is poor, and whose knowledge is small. Therefore the traveller must safeguard himself by sufficient preparation and adequate equipment before beginning his journey, by a preliminary discipline to fit his mind and character for the effort.
-- Perspectives > Chapter 4: Elementary Meditation > # 43
