On the other hand I could definitely do without the Willow Farm section. It may be necessary in order to get to what happens after, but it just doesn't do it for me. The other sections I haven't mentioned are fine, but not up to par with the best portions of the song.
Willow Farm is great. You have the beginning section of the song which takes a downturn in HDIBSB when WF lifts it with a jolly tune to get us ready for the drama to come. SR may have separate sections but it makes a tremendous whole with the sum of the parts being even greater . I read Tony Iommi's autobiography and he deliberately puts in the lighter stuff to make the heavier stuff heavier and WF fits on with this philosophy. All Great stories have light and shade and Willow Farm provides that balance . I've read that Suppers Ready is a hard listen but to me it's an easy listen. Like all their stuff there is nothing that goes on too long , no time to get boring.
Much of SR lyrics create an imagery , oftem without specifics . This gives the listener room to put their own interpretations on it which is great. I've read that WF is just some silliness. I've read it's about a retreat or fat farm .I've read it has nothing to do with the rest of the song . Maybe it's right . But I see it in this way. There's a battle and people die. WF is the after life. They're dead. Like it or not, like what you got your under the soil, literally buried maybe awaiting rebirth bodies melting, .... all change...Theegg was bird... oh no I'm gonna change into a human being, ..... you name them all we've had them here ... And then life goes on to fit our places... mum washing and dad officing.The fox on the rocks is the devil.( PG said the fox is the devil. Spelt focks?) Everything is there. The sheer surface silliness of WF creates a slightly chilling atmosphere and gets us ready for the final battle between good and evil. Well that's how I see it and I like it that way. It fits perfectly.