“The lowest degree of education is to distinguish oneself from the ignorant ordinary man. The educated man does not loathe honey even if he finds it in the surgeon's cupping-glass; he realizes that the cupping glass does not essentially alter the honey. The natural aversion from it in such a case rests on popular ignorance, arising from the fact that the cupping-glass is made only for impure blood. Men imagine that the blood is impure because it is in the cupping-glass, and are not aware that the impurity is due to a property.”