'thologies!

I have been reading a leaflet a Jehovah's Witness gave me. There's a photograph in it in which a man and a lady are having a picnic of 7 apples and reading their Bibles. The man has a much larger Bible than the lady (presumably to represent his raging masculinity) but seems more interested in what the she's reading in hers (I don't think I need to point out what I imagine this implies). Beside the photograph it says:

"Just a signature validates a check (or cheque), God's name guarantees all the promises in the Bible"

So I was wondering, what other things does God's name guarantee? If I was to write "God says the sun is invisible" will it be true now?

Also, the anthologies are finished.