I think Martha may be a character from the Bible. There was a song Taj Mahal did, in which he says, "Mary and Martha standing by the riverside. Mary explaining to Martha, darling, look at the ocean deep and the river wi-i-i-ide - here come old Moses....he had sunshine and good things on his bond." It's called "Your Gonna Need Someone on Your Bond."
Joni has quite a few biblical allusions in her lyrics. Being a PK, I tend to pick up on them. Ruth
