They arrive at their explanation of the Bible through the pages of Watchtower publications. The "faithful and discreet slave" is an illustration Jesus used--where he does not mention 1919, a governing body, or any other books to explain scripture--as an invention for the sake of granting men authority.
Certainly the Bible does not mention dates like 1914, or even 607 B.C. In fact, it mentions no dates we can connect to our calendar. So the chronology is a human invention, the result of taking verses out of their original context and assigning them a meaning beyond the authors' intent.
The Bible does not mention that a group of anointed Christians will help apply the value of the ransom to the rest of mankind. It does mention Jesus doing that, but not anyone else.
The Bible does not say that birthdays are evil just because a couple of murders happened on someone's birthday. Given how detailed God was with like everything else, if he'd wanted to tell us birthdays are wrong, he'd just say it, not go all passive-aggressive, guilt-by-association with it.
The Bible does not say that the generation of anointed ones whose lives overlap with the generation of anointed ones who saw 1914 will not pass away before the end comes.
The Bible does not say that men must shave their beards and that women cannot wear pants.
The Bible does not say that we have to report how many hours we spent preaching to others to a body of elders every month. Much less reporting books, booklets, magazines, return visits, etc.
The Bible says to not forsake gathering ourselves together, it does not say to gather for five meetings a week, two yearly assemblies, and one district convention.
Yet, Jehovah's Witnesses believe these are all Bible teachings. So obviously, the source has to be something other than the Bible. Like the Watchtower publications.
But it's futile to continue this debate. There won't be any reasoning with some folks, and that's fine. I just had to get it out of me.
--sd-7