According to Steve Huey, who reviewed the album on behalf of the online music database AllMusic, "Sabbath's genius was finding the hidden malevolence in the blues, and then bludgeoning the listener over the head with it. ... The standard pentatonic blues scale always added the tritone, or flatted fifth, as the so-called 'blues note;' Sabbath simply extracted it and came up with one of the simplest yet most definitive heavy metal riffs of all time. ...
Says Hip Online: As a vocalist, he (Dylan) broke down the notions that in order to perform, a singer had to have a conventionally good voice, thereby redefining the role of vocalist in popular music. ... (Hip Online) Though folk music is no where near as popular today as it once was, Bob Dylan still remains to his fans a man who became a hero of sorts with his open protests found in his music. ...