A lot of people wonder "What is the blues?". I hear a lot of people saying "The blues, the blues...". But I won't tell you what the blues is. When you ain't got any money, you got the blues. When you ain't got any money to pay your house, you still got the blues...[...]...'cause you're thinkin' evil. And in a time you're thinkin' evil, you're thinkin' 'bout the blues.
[Chester Burnett,
aka Howlin' Wolf,
1910-1976]