De parasito sive artem esse parasiticam
Lucian of Samosata
Lucian, Vol. 3. Harmon, A. M., editor. London: William Heinemann, Ltd.; Cambridge, MA: Harvard University Press, 1921.
The same can be said, too, of the objective reality of rhetoric. When all do not express the same views about one subject, but there is a battle royal of contradictory declarations, that is the greatest proot that the subject of which there is not a single definite conception does not exist at all ; for to enquire whether it is this rather than that, and never to agree
v.3.p.277
that it is one, does away with the very existence of the subject that is questioned.