For instance: this is a pretty good analysis of Love in Vain by Robert Johnson.

I have very little blues that is hard to understand. I feel that is a conclusion based on lack of exposure to real blues. Or perhaps a cultural difference that is hard to get past. These are black men and women from the deep south with little or no education and certainly no exposure to white folks from the north. I am sure they understand each other quite well.

Hell, it took me an hour before I could understand a single word out of Bill Sables. Point is, I did not remove any validity from Bill's music because of this.

It took me a couple of years to get past the recording quality, odd sounds, passion, technique, etc. of the blues before I got to the lyrics. What I found was brilliant. Deep and universal emotion and experience told in a such a way that their uneducated peers in the juke joints and fields could understand… could feel.

Blues is emotional, folk is intellectual.