A successful trader needs to be so arrogant that he can effectively convince himself that he is wrong.There is a link to John Kay on Richard Rorty. He seemed to channel the ghost of Karl Popper, from my quick reading.
I think that my aspirations for humility are career limiting. It is actually amazing that I have the risk limits I do. But then again, I've never come close to blowing up. Aim small, miss small.