Richard S. Weeder said this quote

Yet the denial of feelings is one way of blocking the chronic depression that can descend like a dense fog on those who deal day after day with sickness and death. It is better than not caring at all, better than burning out. Only a few are tough enough to maintain both equanimity and caring for a lifetime; these renowned nurses and legendary physicians are saints of the medical profession. Copper knew a few of them, and he wished he could be more like them. It took a lot of growing up.