Listen to Muddy at 1:58:
I got a job. I was working at a paper factory... I worked there during the days and I played the weekends at house parties, just me and my guitar... Finally it began to leak out, you know, they had a pretty good guy from Mississippi. They called me the young blues singer then. I think I'm responsible for Chicago blues. I think I'm the man that set Chicago up for the real blues.
Yes, Muddy you are the man! Listen to him moan and howl at 2:48. My favorite voice in all of blues.
At 3:34 Muddy ruminates on what it takes to sing the blues:
The type of blues that I sing, you must pay the cost out there. [Long pause.] You just don't get up and walk the streets and get whatever you want to get ready to sing the blues like myself... Plus you gotta go to church to get this particular thing in your soul.
A national treasure.