Psycho-Cybernetics on Relaxation

Excerpted from Psycho-Cybernetics, by Maxwell Maltz:

'Calm mind, calm body; calm body, calm mind.'

Response means tension; lack of response means relaxation.  It has been proved, in scientific laboratory experiments, that you absolutely cannot feel angry, fearful, anxious, insecure, unsafe, as long as your muscles remain perfectly relaxed...Tension in muscles is a preparation for action, or a getting ready to respond.  Relaxing muscles brings about mental relaxation, or a peaceful, relaxed attitude.  Thus, relaxation is nature's own tranquilizer, which erects a psychic screen, or umbrella, between you and the disturbing stimulus.