It's not often I feel stupid, but when it happens, it's helpful for me to remember:
He who knows best knows how little he knows. -- Thomas Jefferson.
We have our limits, our bounds. I was discussing with my sweetie last week about how expertise factors into trust, and I think that's why I really dislike feeling stupid. I like to feel that I know enough about a lot of things that people can trust what I have to say, and can trust that I know what I'm doing. I suppose it's another kind of trust altogether to be able to admit that I don't know something, isn't it?