Enthusiasm – In enthusiasm – or possession – God is understood to be outside, other than or beyond the believer. A sacred power, being or will enters the body or mind of an individual and possesses it. A person capable of being possessed is sometimes called a medium. The deity, spirit or power uses such a person to communicate to the immanent world

Lewis argues that ecstasy and possession are basically one and the same experience, ecstasy being merely one form which possession may take. The outward manifestation of the phenomenon is the same in that shamans appear to be possessed by spirits, act as their mediums, and even though they claim to have mastery over them, can lose that mastery

These words were a sufficient explication of the scene. The nature of his phrenzy, as described by my uncle, was remembered. I who had sought death, was now thrilled with horror because it was near. Death in this form, death from the hand of a brother, was thought upon with undescribable repugnance. In a state thus verging upon madness, my eye glanced upon Carwin. His astonishment appeared to have struck him motionless and dumb. My life was in danger, and my brother’s hand was about to be embrued in my blood. I firmly believed that Carwin’s was the instigation. I could rescue me from this abhorred fate; I could dissipate this tremendous illusion; I could save my brother from the perpetration of new horrors, by pointing out the devil who seduced him; to hesitate a moment was to perish. These thoughts gave strength to my limbs, and energy to my accents: I started on my feet. “O brother! spare me, spare thyself: There is thy betrayer. He counterfeited the voice and face of an angel, for the purpose of destroying thee and me. He has this moment confessed it. He is able to speak where he is not. He is leagued with hell, but will not avow it; yet he confesses that the agency was his.”

My opinions were the sport of eternal change. Some times I conceived the apparition to be more than human. I had no grounds on which to build a disbelief. I could not deny faith to the evidence of my religion; the testimony of men was loud and unanimous: both these concurred to persuade me that evil spirits existed, and that their energy was frequently exerted in the system of the world. These ideas connected themselves with the image of Carwin. Where is the proof, said I, that daemons may not be subjected to the controul of men? This truth may be distorted and debased in the minds of the ignorant. The dogmas of the vulgar, with regard to this subject, are glaringly absurd; but though these may justly be neglected by the wise, we are scarcely justified in totally rejecting the possibility that men may obtain supernatural aid. The dreams of superstition are worthy of contempt. Witchcraft, its instruments and miracles, the compact ratified by a bloody signature, the apparatus of sulpherous smells and thundering explosions, are monstrous and chimerical. These have no part in the scene over which the genius of Carwin presides. That conscious beings, dissimilar from human, but moral and voluntary agents as we are, some where exist, can scarcely be denied. That their aid may be employed to benign or malignant purposes, cannot be disproved.

“Madness, say you? Are you sure? Were not these sights, and these sounds, really seen and heard?” My uncle was surprized at my question. He looked at me with apparent inquietude. “Can you doubt,” said he, “that these were illusions? Does heaven, think you, interfere for such ends?” “O no; I think it not. Heaven cannot stimulate to such unheard-of outrage. The agent was not good, but evil.” “Nay, my dear girl,” said my friend, “lay aside these fancies. Neither angel nor devil had any part in this affair.” “You misunderstand me,” I answered; “I believe the agency to be external and real, but not supernatural.” “Indeed!” said he, in an accent of surprize. “Whom do you then suppose to be the agent?”

Chapter XIX

“I began to realize how important it was to be an enthusiast in life. He taught me that if you are interested in something, no matter what it is, go at it at full speed ahead. Embrace it with both arms, hug it, love it and above all become passionate about it. Lukewarm is no good. Hot is no good either. White hot and passionate is the only thing to be.” ― Roald Dahl, My Uncle Oswald

your enthusiasm as an instructor is indeed contagious and helps predict variables like student motivation in the course.