Seneca · On the approaches to philosophy
Letters 108.29
“Besides,” he says to himself, “think of the epithet that accompanies eld; Vergil calls it bitter,”—
Disease and bitter eld succeed.
And elsewhere Vergil says:
There dwelleth pale disease and bitter eld.
There is no reason why you should marvel that each man can collect from the same source suitable matter for his own studies; for in the same meadow the cow grazes, the dog hunts the hare, and the stork the lizard.
Seneca, Letters to Lucilius 108.29, translated by Richard Mott Gummere