It’s worth mentioning that arrogance is the calling card of insecurity. If a person’s truly smart, and if that person has confidence in his/her intelligence, s/he’s likely to wear intelligence with subtle humility. I’ve known so many brilliant people with a charming modesty; they let intelligence speak for itself, and they never use their brains for intimidation.
Let’s consider the current POTUS, the walking embodiment of arrogance, and man who described himself as “like, really smart” and “a very stable genius.”