George Harrison‘s “My Sweet Lord” was inspired by a song that gave George a religious experience. Subsequently, “My Sweet Lord” became a hit once in the United States and twice in the United Kingdom. The song appeared on a hit album.
According to the 2013 book George Harrison: Behind The Locked Door, George discussed the origin of “My Sweet Lord.” “I remember Eric [Clapton] and [rock duo] Delaney & Bonnie were doing interviews with somebody in either Copenhagen or Gothenburg, and I was so thrilled with [The Edwin Hawkins Singers’] ‘Oh Happy Day,'” said Harrison.
George had a religious experience while listening to “Oh Happy Day.” “It really just knocked me out, the idea of that song and I just felt a great feeling of the Lord,” he said. “So I thought, I’ll write another ‘Oh Happy Day,’ which became ‘My Sweet Lord.'”
Source: cheatsheet.com