Brian Gibbons 
Spirituality and the Occult [PDF ebook] 

Spirituality and the Occult argues against the widely held view that occult spiritualities are marginal to Western culture. Showing that the esoteric tradition is unfairly neglected in Western culture and that much of what we take to be “modern“ derives at least in part from this tradition, it casts a fresh, intriguing and persuasive perspective on intellectual and cultural history in the West. Brian Gibbons identifies the influence and continued presence of esoteric mystical movements in disciplines such as:
* medicine
* science
* philosophy
* Freudian and Jungian psychology
* radical political movements
* imaginative literature.