In the summer of 1994, I became aware of a very strange phenomenon, human spontaneous involuntary invisibility, which was apparently happening to people in the U.S. When I checked with other researchers and discovered that a number of them had also heard of such cases, I decided to place an inquiry letter in several well-known journals, asking other researchers and the general public if they had any experiences of this nature that they would like to share with me. Besides the publication of my inquiry letter, my inquiry was placed on several of the Internet bulletin boards. The letters began pouring in, giving me a broader picture of this phenomenon. I want to share a few stories with you and pass on some of the information I have come across during this past year.
The word occult comes from the Latin word occultus (clandestine, hidden, secret), referring to “knowledge of the hidden” or “hidden knowledge”.
The term occult sciences was used in 16th-century Europe to refer to astrology, alchemy, and natural magic, which today are considered pseudosciences. The term occultism emerged in 19th-century France, amongst figures such as Antoine Court de Gébelin. It came to be associated with various French esoteric groups connected to Éliphas Lévi and Papus, and in 1875 was introduced into the English language by the esotericist Helena Blavatsky.
Throughout the 20th century, the term was used idiosyncratically by a range of different authors, but by the 21st century was commonly employed – including by academic scholars of esotericism – to refer to a range of esoteric currents that developed in the mid-19th century and their descendants. Occultism is thus often used to categorise such esoteric traditions as Spiritualism, Theosophy, Anthroposophy, the Hermetic Order of the Golden Dawn, and New Age.