If meditation may have unfortunate results when its concentrative power is applied negatively or selfishly, contemplation--its higher phase--may have similar results when its passive condition is entered without previous purification or preparation. Miguel de Molinos knew this well and therefore put a warning in the preface of his book The Spiritual Guide which treats with the authority of an expert the subject of contemplation. "The doctrine of this book," he announced, "instructs not all sorts of persons, but those only who keep the senses and passions well mortified, who have already advanced and made progress in Prayer."
-- Notebooks Category 23: Advanced Contemplation > Chapter 7: Contemplative Stillness > # 8
-- Perspectives > Chapter 23: Advanced Contemplation > # 34