My mother used to tell me about vibrations. I didn't really understand too much of what that meant when I was just a boy. It scared me, the word "vibrations." To think that invisible feelings, invisible vibrations existed, scared me to death. But she told about dogs that would bark at people and then not bark at others, that a dog would pick up vibrations from these people that you can't see, but you can feel. And the same existed with people.
"The Beach Boys: The Healing of Brother Brian" in Rolling Stone (4 November 1976)