https://www.youtube.com/watch?v=Ld6fAO4idaI
Peter, Paul and Mary's cover of Bob Dylan's "Blowin' in the Wind"
Dylan said the song has always been a Spiritual
Ezekiel 12: 1-2 . . . have eyes to see, and see not; they have ears to hear, and hear not. . .
which Dylan changed to "how many ears must one man have…?" "…how many times must a man turn his head, pretending he just doesn't see?"
https://en.wikipedia.org/wiki/Blowin%27_in_the_Wind