Toward the end of his life, in the little cottage behind his Lafayette, California house, Bob Birnbaum breathed heavily in his black leather easy chair, his tired eyes closed, as I counted the ways that he had appeared to me during our Wednesday at 4 p.m. blast-offs: Therapist, teacher, surrogate dad, mentor, spiritual master, fellow traveler, bodhisattva, friend, wise leader, beloved, will-bender, pilot. Those are the ones I remember. It was a long list. He shook his head violently at “teacher.” In fact, he scorned all but two – “friend” and “fellow traveler.” When I finished he repeated out loud and nodded vigorously, “That one. Fellow traveler.” Bob (whom I never knew as Swami Prem Amitabh) was raised in the Bronx tenements and projects of the 30s and 40s, so as a Jewish red diaper baby he was applauding the subversive Communist-inspired etymology tucked into the term “fellow traveler.” We were in on the same spiritual secret cabal, Bob and I! Seven years together, an...