“When I was in rehab at the same rehab center in the ’70s, ‘74, ‘75, I got a letter from Keith Richards that had said that they were getting ready to do a tour. And the letter said, ‘We would like to have you on tour with us. We love your music, but what you’re doing right now is more important than what we could ever do with you, [and] we will be sure to come back and get you when you’re ready.’ And that was really cool. That was when they came back in ‘78 and kept their word.”