I think it is more a cautiousness that protects me from enthusiasm about things. I tend not to get excited. People perceive it as a scowl, which is fair enough.
“Was this an old disease, and, if so, which one? If it was new, what did that say about the state of medical knowledge? And in any case, how could physicians make sense of it?”
“The main force used in the evolving world of humanity has hitherto been applied in the form of war.”