Good grief that's an utterly bonkers article. Their 'proof' that they've been chosen as God's mouthpiece (in spite of acknowledging they get it wrong, a lot):
1. They change their minds a lot about what they believe. Therefore that's proof the holy spirit is at work. Because without the holy spirit they obviously could not change their beliefs or something.
2. Angels send JWs to people praying. I'm a little disappointed they don't mention white feathers being found in the vicinity of people who answer the door.
3. They take random verses from the bible, bash them together to come up with a way to forbid something, and that then proves they rely on God's word.
There was a time this pretended to be a religion of bible scholarship. It wasn't, but it tried hard to pretend to be by baffling with BS about Jewish and early Christian versions of the apocalypse. This though, this is drivel. They don't even attempt to explain why (or even how) Jesus chose their apostate religion above all others in 1919, in the hope that eventually they'd muddle their way to something closer to 'the truth' over time.