I don't necessarily mean you personally, but there are many who would argue with this statement. It is those who believe that every word in the Bible should be taken literally to whom I would ask why they don't seem to have a problem with relativity. (BTW, it's in one of the Psalms that the reference to the fixed earth is found. I'm not a Biblical expert, though, so the literalists may try to escape with some interpretation of the original Hebrew text that I am not aware of.)
I'd probably have as much trouble with them as you would.