Numinous is an English adjective describing the power or presence of a divinity

Divinity

Divinity and divine are broadly applied but loosely defined terms, used variously within different faiths and belief systems — and even by different individuals within a given faith — to refer to some transcendent or transcendental power or deity, or its attributes or manifestations in...

. The word was popularised in the early twentieth century by the German theologian Rudolf Otto

Rudolf Otto

Rudolf Otto was an eminent German Lutheran theologian and scholar of comparative religion.-Life:Born in Peine near Hanover, Otto attended the Gymnasium Andreanum in Hildesheim and studied at the universities of Erlangen and Göttingen, where he wrote his dissertation on Martin Luther's...

 in his influential book Das Heilige (1917; translated into English as The Idea of the Holy, 1923). According to Otto the numinous experience has two aspects: mysterium tremendum, which is the tendency to invoke fear and trembling; and mysterium fascinans, the tendency to attract, fascinate and compel. The numinous experience also has a personal quality to it, in that the person feels to be in communion with a wholly other. The numinous experience can lead in different cases to belief in deities, the supernatural

Supernatural

The supernatural or is that which is not subject to the laws of nature, or more figuratively, that which is said to exist above and beyond nature...

, the sacred, the holy, and/or the transcendent.

Rudolf Otto

Otto's use of the term as referring to a characteristic of religious experience was influential among intellectuals of the subsequent generation. For example, numinous as understood by Otto was a frequently quoted concept in the writings of Carl Jung

Carl Jung

Carl Gustav Jung was a Swiss psychiatrist and the founder of Analytical Psychology. Jung is considered the first modern psychiatrist to view the human psyche as "by nature religious" and make it the focus of exploration. Jung is one of the best known researchers in the field of dream analysis and...

 and C. S. Lewis

C. S. Lewis

Clive Staples Lewis , commonly referred to as C. S. Lewis and known to his friends and family as "Jack", was a novelist, academic, medievalist, literary critic, essayist, lay theologian and Christian apologist from Belfast, Ireland...

. The notion of the numinous and the wholly other were also central to the religious studies of Mircea Eliade

Mircea Eliade

Mircea Eliade was a Romanian historian of religion, fiction writer, philosopher, and professor at the University of Chicago. He was a leading interpreter of religious experience, who established paradigms in religious studies that persist to this day...

.

Mysterium tremendum et fascinans (“fearful and fascinating mystery”) is a Latin phrase which Rudolf Otto uses in The Idea of the Holy to name the awe

Awe

Awe is an emotion comparable to wonder but less joyous, and more fearful or respectful. Awe is defined in Robert Plutchik's Wheel of emotions as a combination of surprise and fear...

 inspiring mystery that was the object common to all forms of religious experience.

Mysterium tremendum is described in The Doors of Perception

The Doors of Perception

The Doors of Perception is a 1954 book by Aldous Huxley detailing his experiences when taking mescaline. The book takes the form of Huxley’s recollection of a mescaline trip which took place over the course of an afternoon, and takes its title from William Blake's poem The Marriage of Heaven and Hell...

by Aldous Huxley

Aldous Huxley

Aldous Leonard Huxley was an English writer and one of the most prominent members of the famous Huxley family. Best known for his novels including Brave New World and a wide-ranging output of essays, Huxley also edited the magazine Oxford Poetry, and published short stories, poetry, travel...

 in the following terms:

The literature of religious experience abounds in references to the pains and terrors overwhelming those who have come, too suddenly, face to face with some manifestation of the mysterium tremendum. In theological language, this fear is due to the in-compatibility between man's egotism and the divine purity, between man's self-aggravated separateness and the infinity of God.

Non-religious usage

The idea is not necessarily a religious one: noted atheists Carl Sagan

Carl Sagan

Carl Edward Sagan was an American astronomer, astrophysicist, cosmologist, author, science popularizer and science communicator in astronomy and natural sciences. He published more than 600 scientific papers and articles and was author, co-author or editor of more than 20 books...

, Christopher Hitchens

Christopher Hitchens

Christopher Eric Hitchens is an Anglo-American author and journalist whose books, essays, and journalistic career span more than four decades. He has been a columnist and literary critic at The Atlantic, Vanity Fair, Slate, World Affairs, The Nation, Free Inquiry, and became a media fellow at the...

, Daniel Dennett

Daniel Dennett

Daniel Clement Dennett is an American philosopher, writer and cognitive scientist whose research centers on the philosophy of mind, philosophy of science and philosophy of biology, particularly as those fields relate to evolutionary biology and cognitive science. He is currently the Co-director of...

, Richard Dawkins

Richard Dawkins

Clinton Richard Dawkins, FRS, FRSL , known as Richard Dawkins, is a British ethologist, evolutionary biologist and author...

 and Sam Harris

Sam Harris (author)

Sam Harris is an American author, and neuroscientist, as well as the co-founder and current CEO of Project Reason. He received a Bachelor of Arts in philosophy from Stanford University, before receiving a Ph.D. in neuroscience from UCLA...

have discussed the importance of separating the numinous from the religious.