Insightful. If one applies aikido to their philosophy of life, it can be threatening to have that foundation disrupted. Personally I find it uncomfortable, but refreshing when some error is pointed out in my beliefs and understandings that require me to rethink any inconsistencies.
I've had the carpet pulled out from under me far too many times to ever get complacent enough to feel threatened when my foundation is disrupted.
In fact, if I start to feel complacent, I think something is wrong with my foundation. lol.