Whoever can understand that substance is inseparable from life and that life is inseparable from mind, whoever can intellectually perceive that the whole universe itself is nothing less than Mind in its different phases, has found the theoretical basis for an appreciation of the wonderful possibilites which dwell behind human experience. The mind's powers can indeed be extended far beyond their present puny evolutionary range. He who reflects constantly upon the true and immaterial nature of Mind and upon its magically creative powers tends to develop these powers. When he becomes capable of successful and ego-free concentration, these powers of mind and will come to him spontaneously. It is natural that when his will becomes self-abnegated, his emotion purified, his thought concentrated, and his knowledge perfected higher mental or so-called occult powers arise of their own accord. It is equally natural that he should remain silent about them, even if only because they do not really belong to the named personality which others see. They belong to the Overself.
-- Notebooks Category 21: Mentalism > Chapter 5: The Key To the Spiritual World > # 53
-- Perspectives > Chapter 21: Mentalism > # 60