Men might quarrel over what is meant by horizons in medicine. I mean by horizon the time at which an idea, proved true and beneficial to the health of mankind, which in the breadth of its effects on the multiplicites of sickness alters our whole disease concept and is of such scope that its deliniation may occupy lesser mortals for years, centuries, yes, even millennia. Medicine has had few horizons and the dawning has often been long in coming to the whole earth.
Gowen, John W.
"Over the Medical Horizon,"
Iowa State University Veterinarian: Vol. 4
, Article 5.
Available at: https://lib.dr.iastate.edu/iowastate_veterinarian/vol4/iss3/5