“I've walked a lot in the mountains in Iceland. And as you come to a new valley, as you come to a new landscape, you have a certain view. If you stand still, the landscape doesn't necessarily tell you how big it is. It doesn't really tell you what you're looking at. The moment you start to move the m”

“The fatigue produced on the muscles of the human frame does not altogether depend on the actual force employed in each effort, but partly on the frequency with which it is exerted.”