Out of all The Beatles, John Lennon and George Harrison were the most spiritual. They were the most dedicated to meditation when the group traveled to Maharishi Mahesh Yogi’s retreat at his ashram in Rishikesh, India.
Then, George started reading about Hinduism, the Hare Krishna movement, and learning about mantras and chanting. He showed John, and he became interested too. They loved it so much that they once sailed through the Greek Islands chanting until their jaws ached.
In 1982, George told a leader in the Hare Krishna movement, Mukunda Goswami (per the Guardian), that his spirituality started once he saw what was over the wall he’d hit at the time. He started reading about meditation, mantras, chanting, and Hinduism.
Source: cheatsheet.com