If you think the two are mutually exclusive, listen to:

Josh White, particularly his version of "His Eye Is On The Sparrow"
or Big Bill Broonzy's "This Train" or "Hush, Somebody's Callin' Me"
or Misissippi John Hurt's "Oh, Mary, Don't You Weep" and "Prayin' On The Old Campground"
or bunches of things by Rev. Gary Davis.

If I were at home and could flip through my records and CDs, I could probably name a hundred more pretty easily.

The songs are gospel/spiritual in content, but the form is blues.

david