" Only I can control the messages in my head. I may not have installed them, but, with great effort and a lot of practice, I can at least choose what to play at what time. These are the best two life lessons I ever learned on a tough trail in the great outdoors: One, not to look up and see how far I still have to climb. Instead to look back and see how far I’ve climbed already. When I see what I just did, I know I can do what comes next. Given time. And, two, to give myself time. "

― Catherine Ryan Hyde , The Long, Steep Path