This thread has taken off in some interesting directions, and I thank those who have given it some serious thought and attention. You have been very helpful! Guest, I'll try to answer your questions. By the way, I did give quite a few examples in earlier postings to help jump-start the discussion.
1. Drugs: I am not implying, nor am I advocating. I am reporting a historical fact: For a short time period, largely while LSD was still legal, many took acid and pot in search of religious experiences; to see God, to feel at one with the universe, etc. These folks frowned on people who took drugs simply to get wasted. There was a lot of music going down that reflected the spiritual experiences people felt they were having while on drugs: The Dead, the Sons of Champlin, Donovan, Beatles, etc. etc.
2. The examples of musicians who embraced spiritual groups, teachers, religions etc. and then expressed it through their music you gave are part of what I am contemplating. Many people who followed them, and some of the musicians themselves, later felt their enthusiasms were misguided. That is immaterial to me--I'm wondering what people were inspired by at the time, and what they were inspired to do, think etc. by music--and which music! (FYI, I believe that just because sometimes we feel we took a wrong turn or two doesn't invalidate the fact that we were searching, or denigrate what we were searching for.)
3. Spirituality is a deeply personal phenomenon and cuts a wide swatch through human experience. So does its music. The sixties saw everything from those Catholic guitar masses to make them more "relevant" to youth, to kids who took off for the Himalayas searching for enlightenment after listening to Beatles music, to The Church of John Coltrane, to those who were inspired to take social action in the name of God's love in the Civil Rights Movement. Music embodied, or at least accompanied, all of it. I am interested in what people interpreted as spiritual music in the sixties, and what it inspired them to do/think/explore. Okay, that's my last clarification and exposition. Thanks again to all who have weighed in so far. You've given me a lot to think about. Any more personal experiences are welcome.