In 1968 The Beatles were feeling a lot of pressure to advocate for a violent change to the "status quo" regarding governments and the Viet Nam war. But in the song "Revolution" he wrote the words...
Well you know
We all want to change the world
But when you talk about destruction
Don't you know you can count me out
John Lennon did not want his music to be used for political purposes. He was all about peace, love, drugs, and rock'n'roll.
"During overdubs which brought the recording to take 20, Lennon took the unusual step of performing his lead vocal while lying on the floor. He also altered one line into the ambiguous "you can count me out, in". He later explained that he included both because he was undecided in his sentiments."
This is from the Wikipedia page about the song, quoted from a book on The Beatles recording sessions. Sometimes what make it to vinyl/tape/CD/hard disk doesn't completely convey what the artist feels.