Religion is for people who’re afraid of going to hell. Spirituality is for those who’ve already been there.

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.