They just said “Roll the tape.” No rehearsal or nothing …. Muddy [Waters] didn’t come in and say, “I wanna rehearse.” He used to look at me and say, “Let’s just play the blues. That’s all you need to do.” Buddy Guy

Jas Obrecht, “Buddy Guy: The Happiest Man Alive,” Guitar Player (June 1993): 88-96

The quote was reproduced in Zen Guitar, by Philip Toshio Sudo, which I strongly recommend to everyone!