Source: God Is Red (1973), p. 293
Vine Deloria Jr. quotes

Vine Deloria Jr.
Birthdate: 26. March 1933
Date of death: 13. November 2005
Vine Victor Deloria Jr. was a Native American author, theologian, historian, and activist. He was widely known for his book Custer Died for Your Sins: An Indian Manifesto , which helped attract national attention to Native American issues in the same year as the Alcatraz-Red Power Movement. From 1964 to 1967, he had served as executive director of the National Congress of American Indians, increasing tribal membership from 19 to 156. Beginning in 1977, he was a board member of the National Museum of the American Indian, which now has buildings in both New York City and Washington, DC.
Deloria began his academic career in 1970 at Western Washington State College at Bellingham, Washington. He became Professor of Political Science at the University of Arizona , where he established the first master's degree program in American Indian Studies in the United States. In 1990, Deloria taught at the University of Colorado Boulder until 2000, when he returned to Arizona and taught at the College of Law. Wikipedia
Quotes Vine Deloria Jr.
Commonly attributed to Deloria on the internet, or sometimes to a few others, but without legitimate sourcing, the earliest variant of this yet located is a single quotation in Awakened India Vo. 99 (1994) p. 327, ascribed to Fr. Patrick Collins, University of Notre Dame, USA:
Religion is for those who are afraid of going to hell. Spirituality is for those who know they have been there — perhaps through involvement with religion.
The next variant located is ascribed to an anonymous member of Alcoholics Anonymous in Illuminating the Heart: Steps Toward a More Spiritual Marriage (1996) by Barbara G. Markway, p. 28:
Religion is for people who are afraid of going to hell; spirituality is for those who have been there.
A variant also occurs in The Higher Power of the Twelve-Step Program: For Believers & Non-Believers (2001), by Glenn F. Chesnut, Ch. 1 : Discovering a Higher Power:
Religion is for people who're afraid of going to hell; twelvestep spirituality is for those who've been there.
Misattributed
pg. ix
God Is Red (1973)
As quoted in "Daniel Quinn: Another Interpretation of the ‘Meaning of Life" by Nicolae Tanase, at Excellence Reporter (28 March 2016) https://excellencereporter.com/2016/03/28/daniel-quinn-another-interpretation-of-the-meaning-of-life/
Source: God Is Red (1973), p. 209
Source: God Is Red (1973), p. 204
pg. 75
God Is Red (1973)
As quoted in "Vine Deloria Jr." by Melissa Lorenz EMuseum @ Minnesota State University, Mankato (2008) https://web.archive.org/web/20080925082716/http://www.mnsu.edu/emuseum/history/mncultures/vinedeloriajr.htm
Foreword to Words of Power: Voices from Indian America (1994), also quoted in "Vine Deloria, Jr." at Indigenous Peoples Literature (2015) by Glen Welker http://www.indigenouspeople.net/vine.htm
„Most tribal religions make no pretense as to their universality.“
Source: God Is Red (1973), p. 210