Prior to writing and recording the song, George Harrison had been taking hallucinogenics like LSD and learning about Indian culture because it was the '60s and that's what most rock musicians were doing. According to Rolling Stone, Harrison discussed the experiences he had while using LSD, saying "you could spend the rest of your life trying to explain what it made you feel and think." The song "I Want to Tell You" addresses "the avalanche of thoughts that are so hard to write down or say or transmit," per Harrison's statements about it in his autobiography "I, Me, Mine."
Songs like "I Want to Tell You" and the entire "Revolver" album as a whole marked a shift in the Beatles. More of Harrison's contributions made the final cut than in past albums. This trend continued throughout the rest of the band's time together. Harrison went on to pen monumental songs for the band like "Something" on the 1969 album Abbey Road. He was inducted into The Rock & Roll Hall of Fame in 2004.
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