Hmmmm . . .
On the one hand, I'm not entirely sanguine about creating a physical shrine to John Coltrane. I have never heard anything that would suggest that the man himself would endorse anything like that. And his immediately family, all but one of whom are still very much alive, a) do not seem to be behind the effort; b) chose to leave the place, for whatever reasons at the time; and c) do not endorse Coltrane-worship other than in its purest sense, through musical practice and exploration. Along those lines, the Coltrane family HAS preserved John's horns, and they sure have reissued his music, to the benefit of all of us.
On the other hand, George Washington and his family discouraged hero-worship. Others chose to preserve some physical connection to his legacy, and that's a good thing.
What does it mean when John Coltrane is considered to be a bona-fide component of American history?
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Following those notions, here is a link to a fairly lengthy interview with John Coltrane about his spiritual beliefs. I'm not fond of the interviewing style, but it is a thrill to hear nevertheless.
http://slought.org/content/11161/