That talk is an example of the methods in which Jehovah’s Witnesses are systematically trained. The method of “spiritual feeding” is: read – retain – recite.
Questioning the “spiritual food” or even the way it is dispensed is described as “prideful”. This is why most JWs cannot really think through or reason on the inconsistencies, contractions, and outride fallacies of their beliefs.
As an example, an interesting experiment is to ask a JW if they have ever studied all of the archeological proof that humans have been on earth for at least a million or so years (contrary to their belief of 6,000). The kind of canned, clichéd responses you get is very telling; and are characteristic of someone who has not even looked at any of the evidence, but has been TRAINED what to think on the matter.
The same holds true for their beliefs about "God's channel of communication" here on earth. What rational person would pick up the New Testament and interpret Jesus' words to apply to a 20th century printing operation headquartered in Brooklyn; had they not been indoctrinated to think so?