But it turns out the Hey Jude writer dabbled with certain illicit substances from time to time – and once got so high that he saw God.
Speaking to the Sunday Times, Macca recalled the time he took DMT (dimethyltryptamin), a powerful psychedelic drug derived from plants.
“[I was] immediately nailed to the sofa — and I saw God, this amazingly huge towering thing, and I was humbled,” he said, after taking the narcotic with others including art dealer and gallery owner Robert Fraser.
“And what I’m saying is, that moment didn’t turn my life around, but it was a clue.
“It was huge. A massive wall that I couldn’t see the top of, and I was at the bottom. And anybody else would say it’s just the drug, the hallucination, but both Robert and I were like, ‘Did you see that?’ We felt we had seen a higher thing.”
Get ShortList Daily straight to your inbox for free
Get exclusive shortlists, celebrity interviews and the best deals on the products you care about, straight to your inbox.
DMT became popular in the 1960s as a faster-working alternative to more widely-known hallucinogenics such as LSD and magic mushrooms, according to The Independent.
The Beatles have long been linked with religion and spiritualism, from their famous 1968 trip to India to study meditation with the Maharishi Mahesh Yogi to McCartney, in 2012, saying he has a “personal faith”.
McCartney releases his first full-length album in five years, Egypt Station, on 7 September.