Hast thou considered the tetrapod is a reference to the writers future evolution beyond a smothered sub-human creature. He's looking forward to the day he will be free from the opression of his family life, and grow into a independent, free thinking person. When
he says "one of these days I'm gonna wriggle up on dry land" - he's basically making an exclamation to himself saying - "Someday, all of this will be over and you will not control me anymore."
Also, the Book of Judgement has a lot of "Hast thou's" in it too. He's also saying - remember what happened to the creatures in the slime - eventually the grew up, evolved and took over the earth - keep that in mind next time you try to hold me down. You'll eventually get yours.
Hast thou considered the tetrapod is a reference to the writers future evolution beyond a smothered sub-human creature. He's looking forward to the day he will be free from the opression of his family life, and grow into a independent, free thinking person. When he says "one of these days I'm gonna wriggle up on dry land" - he's basically making an exclamation to himself saying - "Someday, all of this will be over and you will not control me anymore."
Also, the Book of Judgement has a lot of "Hast thou's" in it too. He's also saying - remember what happened to the creatures in the slime - eventually the grew up, evolved and took over the earth - keep that in mind next time you try to hold me down. You'll eventually get yours.
It's a brilliant song title and a great song.