It shows too a mind that is closed to anything that doesn't fit what is officially sanctioned at the moment. So we get the well-known report of the overseer saying that if the Society said that his green Bible was really black, he would believe it! Or the elder who boasts that he loyally believes that whatever is in the current issue of the Watchtower is "real" truth!
How often we've encountered this as we speak to dubs. Simply raising a query as was done on Revelation 22 brings the dismissive comment; it's "a small fault".
There's none so blind as those who will not see!