I think that a good person can sometimes do wrong out of ignorance or weakness or wrong thinking, but when hard times come, the goodness wins out after all. And a bad person can often seem good and trustworthy for a long time, but when hard times come, the evil in him gets revealed.
I don't want to fail, of course. But even though I didn't know how bad things really were, I still had a lot to think about before I said yes. I had to consider the implications for Pixar, for my family, for my reputation. I decided that I didn't really care, because this is what I want to do. If I try my best and fail, well, I've tried my best.