It's a joke to think that anyone is one thing. We're all such complex creatures. But if I'm going to be a poster child for anything anger's a gorgeous emotion. It gets a bad rap but it can make great changes happen.
A witness in the sense that I am using the word is a man whose life and faith are so completely one that when the challenge comes to step out and testify for his faith he does so disregarding all risks accepting all consequences.