Most physicists enjoy the outdoors. They are mushroom gatherers, bird watchers, hikers, amateur mountaineers whose idea of weekend relaxation is to c… - Heinz Pagels

Some years later I spoke to a mentally disturbed young man. Very agitatedly, he described to me how alien beings from outer space had invaded the earth. They were formed of mental substance, lived in human minds, and controlled human beings through the creations of science and technology. Eventually this alien being would have an autonomous existence in the form of giant computers and would no longer require humans–and that would mark its triumph and the end of humanity. Soon he was hospitalized because he was unable to shake off this terrible vision.

Mountain climbing is an analogue of the research process in theoretical physics. In working on a problem in physics one is never assured of a solution, because there are many false leads and pitfalls. Likewise in climbing there is no certainty of attaining the summit; the route is often unknown, or sometimes one attains a false summit. But the important point is that if you reach the top, the view is enormous. There is no comparison between what you see from just below the summit and what you can see from the top. Similarly with finally solving an important problem in physics the view you get is enormous.

People did not always love the mountains. Just a few hundred years ago the high mountains were regarded as horrible, monstrous places filling people with terror and fear. The inhabitants near them were seen as awful demons, subhumans. But this attitude got transformed into just the opposite, especially by Romantic writers and painters in the nineteenth century. Seen by the Romantics, high mountains became places of impossible beauty, where the quality of light and the expansive solitary grandeur of the high peaks opened the heart of the individual. A man climbing a mountain became the image of self-conscious intelligence pitted against the eternal indifference of the forces of nature. Compared to these forces of nature, we are nothing save for the will that moves our limbs. Only that will is truly our own.