The WTS has made vague statements about the unforgivable sin metioned in the Bible but we all know that you can curse God and Jesus and be forgiven but should you promote the idea that the WTS is not God's only Earthly channel and that organization is a fraud, that will not be forgiven.
On a person note, should you guys call a woman by the wrong name when you are first trying to get to know her, that will not be forgiven, especially if you call her a co-workers name!
Driving your car on my front lawn will piss me off almost to the point of no return, do it twice and I'm done with you!
So what about you? What is your, unforgivable sin?