When I was studying with JWs, the study conductors told me that I needed to "make sure of all things."
The first chapter of "The Truth that Leads to Eternal Life" (the study book at that time) contained the following statement on page 13:
"We need to examine, not only what we personally believe, but also what is taught by any religious organization with which we may be associated. Are its teachings in full harmony with God's Word, or are they based on the traditions of men? If we are lovers of the truth, there is nothing to fear from such an examination."
Even if I had been previously baptized as a Roman Catholic, Methodist, Baptist, Lutheran, or whatever, I was told that I needed to re-examine that commitment and renounce it if I learned that their teachings were in error. I was told that there was no dishonor in renouncing my previous commitments. In fact, to renounce that earlier baptism was seen as NOBLE, a humble admission of error and a sensible change of life path.
This led me to believe that if a JW ever encountered a serious challenge to WT teaching that they would be determined to get to the bottom of it, agonizing over it if need be, in order to keep making sure that what they were being taught really was TRUTH.
Not so.
I didn't realize that this quote applied to "any religious organization EXCEPT the Watchtower."
Why the double standard?
As we know, the WTS portrays all of life as a sovereignty struggle between Jehovah and Satan in which you have to decide whose side you're on.
Contrary to the language quoted above, once you are baptized as a JW, you discover that in the WT world, you are seen as having made an irrevocable lifetime commitment of absolute loyalty to the GB as Jehovah's chosen channel.
Even though you may have become a JW because your were convinced of specific doctrines (war, trinity, hell, 1914, etc.), you learn that the one "truth" to which you really were committing was that the GB always speaks for Jehovah and that whenever they change THEIR view of truth and proclaim "new light," you are required to automatically change your view of truth to conform.
That is, the command to "make sure of all things" ends at your JW baptism. You find out that by getting baptized as a JW, you were saying that you had once and for all "made sure" that the GB speaks for Jehovah and that ends your right and need to think. "Independent thinking" is now the greatest possible evil. To question what the GB taught you or even to question the changes the GB makes in doctrine is seen as a sinful doubting of God's sovereign choice of the GB (to which you already committed), and starting on the path to full Satan-like rebellion and apostasy.
If you were raised in the organization, you may say that you had no choice. If you were converted, you may say that when you got baptized as a JW there was much that you HADN'T investigated and much that was hidden. But if you make such statements, the whole thing is turned on you and you are accused of condemning yourself as lazy or a fool. Why did you commit yourself to "Jehovah's service" and "Jehovah's organization" then? Didn't the study conductors tell you how important it was to "make sure of all things"? Didn't they tell you what a solemn commitment you were making to Jehovah God? What must He think of you now when you are trying renege on your commitment?
Suddenly, YOU are the fool, the knave, the villain, the shallow thinker who gave his word to God and is now trying to back out of it.
Because of this indoctrination and the accompanying fear, guilt, and groupthink, most JWs never ask, "Wait a minute. How is it that is was NOBLE for me or others to re-examine our baptismal commitment to the Pope, the Methodist Church, the Baptist Church, the Lutheran church, etc. in the light of better information but now it's DESPICABLE for me to re-examine my baptismal commitment to the GB of Jehovah's Witnesses or to 'make sure' of the things they are now telling me? Why is it suddenly evil for me to humble myself and admit that I was wrong?"
Perhaps that is the question we need to pose to JWs we know, realizing that many of them are too deeply indoctrinated or frightened to even consider it.