In the lab, you could go for three or four weeks, sometimes longer, without having the sense that you did anything worthwhile. But when you have that occasional flash — it doesn’t come very often — that occasional flash where you see something, you know something that nobody else ever knew before, that makes it all worthwhile. That’s that sort of moment of inspiration, that recognition of some new phenomenon that only God was aware of until that moment. That keeps you going. That gets you through all those months of failed experiments and flawed hypotheses, and keeps you wanting to go on to the next step.