Actually, I think I run for happiness. I think that life has to be cheerful, and that is what I am looking for. For me, happiness is to get in touch with nature, with the mountain, making sport. So I run for that.
Whatever song you have in your head had better be a good one. Whatever story you are telling yourself had better be a story about going on. There is no room for negativity. The reason most people quit has nothing to do with their body.