I think you have to really care about what you’re doing, because anything worth doing is going to be challenging and it’s going to have a high risk of failure. I have failed more times in my life than I could tell you about. Hunting for disease genes is a very failure-prone process and that’s mostly what I’ve done in my scientific career — for cystic fibrosis, for Huntington’s disease. We’re right now hunting for the genes for adult onset diabetes, which is the hardest thing I’ve ever done and I don’t know if it’s going to work. I have a sign on my wall which is a quote from Winston Churchill, which says, “Success is nothing more than going from failure to failure with undiminished enthusiasm.” And that I think says a lot. You’ve got to expect this, especially in science.