XXI
There are certain caves a glance down into which has cost people their life. So swift is their destructive power that it kills in flight the birds that cross them. That is the kind of air and the kind of place from which waters of death escape. If the infection of the air and place is less severe, the damage is less fatal too, merely affecting the sinews like men overpowered by intoxication. I am not at all surprised that place and air infect water and render it similar in character to the tract through which and from which it proceeds. Similarly, milk shows the taste of the cow’s fodder, the quality of the wine comes out even in the vinegar it yields. There is, in fact, nothing that does not bear marks of its origin in the same way.