Life is just a series of peaks and troughs. And you don't know whether you're in a trough until you're climbing out, or on a peak until you're coming down. Ricky Gervais
I think the rocket business is quite cyclic. There are a great many peaks and troughs. Elon Musk
I love that, even after jumping through hoops forever, I can still get that buzz, that hook. That's very healthy, but it's bittersweet, too, because if you don't get the part, you have to deal with the disappointment. I don't think I'll ever negotiate those peaks and troughs wholly healthily. Gina McKee