A thought occurred that there is a danger in thinking we know everything, or have it all figured out in life. Especially when it comes to matters of doctrine or faith.
Witnesses (or at least the society as a whole) are so self-confident, so proud to be the only ones who know "the truth" about everything to do with the universe, the earth, our past and our future, that pride kicks in. And pride is dangerous...(.and before a fall)
What happens then when teachings, understandings or doctrines are wrong?
The moment we think we know everything, we actually know nothing.