JWs stand for the Truth. The Truth as explained by the Governing Body. The Truth has changed back and forth and will continue to change, but is always True. This is because the definition of Truth is whatever the Governing Body tells us is True. There is Present Truth, Future Truth and Past Truth. Only present Truth is True. However, Past Truth is not false because it was once Present Truth. Future Truth is more True than Present Truth. JWs can rest assured that by standing for the Truth, they are standing for God and the Bible. They are confident of this because they have verified their stand by understanding the scriptures they way the Governing Body tells them to.
Those who believe that the Truth conflicts or goes beyond the Bible, and take a stand for it, are shunned and considered to have fallen from the Truth. If they later reject their belief of what is true, then they can once again stand for the Truth.