It can't be the word of god if you constantly have to re-explain what it is 'supposed' to mean every time reality proves the old explanation wrong. When the "TRUTH" has to constantly undergo revision, it isn't really truth, is it? But, to admit the nature of such "Truth" is to deny themselves authority, and that is something they never want to do.
Dave, that sums the wts up perfectly. It seems whenever time is running out on something they have said "must" happen, they come up with "new light" as an excuse to adjust their thinking, and the rest of the jws have to accept it, or be disciplined. They have been getting away with this trick for so long now, and it works every time, so why stop now? Some might question it, but the majority won't (daren'0 even think of doing so.