The song "Glass Spider" and its companion piece, "Day-In Day-Out" is about a crack mother and her babies.
"Glass Spider" is a euphemism for a crack addict. Many of the songs on this album deal directly with the crack epidemic.
Ironically, "Glass Spider" deals as much with her babies as the mother herself.
The song "Glass Spider" is about what it's like to be born of a crack addicted mother. Your temperament is "savage and afraid"; you are furious, angry, always on the move and paranoid.
The only antidote for this inherited condition is exercise: "run, run, stay low to the ground, spitting out the dawn.