Ive only just stumbled onto this thread so have missed too much to catch up.
Perhaps it all comes down to consistancy and being yourself. The truth of you rarely changes, only the ways of expressing it does over time. The brain will always want to challenge everything, and for good reason, it keeps life interesting and dynamic. Without it, we would have no need of this forum and exchanges with others. But anyway, I'm getting off topic here.
I think its more about the attitude
with which we challenge others, rather then the challenge itself. Without the need to question, we would all just be happy to sit like zombies and nod our heads. Ideas, beliefs and opinions change like shifting sands unless one is staunch in wanting to cling to something because it helps them to feel safe and grounded into the world.
Its true that the more we know, the less we know. Science is always disputing theories, only to find another theory to research. I do think our universe is like a bottomless coffee, as fast as we come to resolve one avenue of thought, a new door is opened. Investing is fun...its only when our intent is to put down others, that its not.
I particularly resonated with what nothuman wrote above me. The challenge is in letting go of holding onto beliefs or wanting to prove oneself right. Once in this space...the chains aren't so easily rattled LOL . Its almost like we appear somewhat cold and detached.