Ask any honest scientist and he will tell you that there are lots of theorys but no one is sure what causes planetary attraction
One of lifes little mysteries
we'd be in trouble without it so I'm not gonna push the point
Like the great man said (roughly)
When your sitting on a fifty ton rock flying through the air suspended only by a Druids belief it might not be the best time to discuss theology or doubt
My other Pratchett favourite is the one about being as sensible as
A man standing on a hilltop in a thunder storm with one foot in a bucket of water, wearing Copper armour, waving a copper sword above his head and shouting
"All Gods are B*st*rds"
Can't you just see me doing that Toddy
just for a laugh like
Jason