This is unbelievable. The very definition of "testing" is to undergo an investigation of the subject at hand in order to establish its quality and reliability. Synonyms for "testing" are words like "scrutinizing" and "assessing" - NOT "believing" as Watchtower has so insidiously switched over to in their reinforced rhetorical questions.
"Belive" is, if anything, the antithesis of the word "test":
Once again, there's what the scripture ACTUALLY says, versus what Watchtower tells its members it says. Shameful, and a total indicator of how conditioned JW readers are, because I'm willing to bet left nut that no one in the audience saw this jarring contradiction.