“THE ALL is MIND; The Universe is Mental.”–The Kybalion.
The Hermetic Principle Of Mentalism:
This Principle embodies the truth that “All is Mind.” It explains that THE ALL... is SPIRIT, which in itself is UNKNOWABLE and UNDEFINABLE, but which may be considered and thought of as AN UNIVERSAL, INFINITE, LIVING MIND. It also explains that all the phenomenal world or universe is simply a Mental Creation of THE ALL, subject to the Laws of Created Things, and that the universe, as a whole, and in its parts or units, has its existence in the Mind of THE ALL, in which Mind we “live and move and have our being.” This Principle, by establishing the Mental Nature of the Universe, easily explains all of the varied mental and psychic phenomena that occupy such a large portion of the public attention, and which, without such explanation, are non-understandable and defy scientific treatment.
An understanding of this great Hermetic Principle of Mentalism enables the individual to readily grasp the laws of the Mental Universe, and to apply the same to his well-being and advancement. The Hermetic Student is enabled to apply intelligently the great Mental Laws, instead of using them in a haphazard manner. With the Master-Key in his possession, the student may unlock the many doors of the mental and psychic temple of knowledge, and enter the same freely and intelligently. This Principle explains the true nature of “Energy,” “Power,” and “Matter,” and why and how all these are subordinate to the Mastery of Mind. One of the old Hermetic Masters wrote, long ages ago: “He who grasps the truth of the Mental Nature of the Universe is well advanced on The Path to Mastery.” And these words are as true to-day as at the time they were first written. Without this Master-Key, Mastery is impossible, and the student knocks in vain at the many doors of The Temple.
(The Kybalion, 1908, The Yogi Publication Society, Masonic Temple, Chicago, ILL, Chapter 2, page 9.)