One of psychologies’ earliest practitioners was Dr. William James PhD., (1842 – 1910). He established psychology’s department at Harvard and identified the following four main characteristics of mystical experiences, given here in summary:
Ineffability. Experiences beyond words. He said mystical experiences have to be experienced to be understood. This word is still in use by some modern scholars and physicists who otherwise presumbly dare not risk their reputations in outright declaration of their accceptance of the revelatory mystic phenomenon.
Noetic quality. The experiences give cosmic knowing, insights into existence. Experiencers (mystics) acquire a knowledge of infinite intelligence, as well as of an infinitely huge presence, a power of non human reality otherwise unknown to man. (And non-biological, religious or idealogical in my case).
Transiency. Mystical experiences are usually brief though their influence is permanent. (In a state of continuing development of the mystic in my experience).
Passivity. “The mystic feels as if his own will were in abeyance” or “as if he were grasped and held by a superior power.” (Hence my certainty that Reality Rules!).
William James. The Varieties of Religious Experience. 1958.
Types of Mystical Experiences.