The aspirant whose sensitivity creates a psychic reaction of discomfort in the presence of certain persons may overcome this negative situation by learning the art of building a mental wall around himself the moment he becomes aware of what is happening--that is, as soon as he experiences the impact of this undesirable atmosphere. It must be done swiftly and with an attitude of calm deliberation and emotional detachment.

-- Notebooks Category 16: The Sensitives > Chapter 14: The Sensitive Mind > # 37