威廉·詹姆斯（William James，1842—1910）美國本土第一位哲學傢和心理學傢，也是教育學傢，實用主義的倡導者，美國機能主義心理學派創始人之一，也是美國最早的實驗心理學傢之一。1875年，建立美國第一個心理學實驗室。1904年當選為美國心理學會主席，1906年當選為國傢科學院院士。2006年，詹姆斯被美國的權威期刊《大西洋月刊》評為影響美國的100位人物之一（第62位）。

The Varieties of Religious Experience , by William James , is part of the Barnes & Noble Classics series, which offers quality editions at affordable prices to the student and the general reader, including new scholarship, thoughtful design, and pages of carefully crafted extras. Here are some of the remarkable features of Barnes & Noble Classics :

All editions are beautifully designed and are printed to superior specifications; some include illustrations of historical interest. Barnes & Noble Classics pulls together a constellation of influencesbiographical, historical, and literaryto enrich each reader's understanding of these enduring works. 0in 0in 0pt">Acclaimed as one of the greatest works of nonfiction published in the twentieth century, William James ’s The Varieties of Religious Experience was revolutionary in its view of religious life as centered not within the Church but solely within the feelings, acts, and experiences of individual men in their solitude.”

Using the language of psychology, James tries to explain religious phenomenasuch as conversion, repentance, mysticism, and saintlinessas psychic energy that arises from the unconscious mind in times of trouble. To support his theories, James turns to the autobiographical writings of a wide variety of mystics and writers, including Walt Whitman, Martin Luther, Voltaire, Emerson, and Tolstoy. The result is a colorful and wide-ranging collection of recorded experiences that James compares, categorizes, and analyzes. Many of his categoriesincluding the sick soul, the divided self, and healthy-mindednesshave become standard in the study of religions.

Exquisitely written, The Varieties of Religious Experience has had a profound influence on modern spiritual thought, including the psychology of religion and recovery programs such as Alcoholics Anonymous.

Wayne Proudfoot is Professor of Religion at Columbia University, specializing in the philosophy of religion. He has published Religious Experience, as well as articles on William James, Charles Sanders Peirce, and American Protestant thought.