Calumniae non temere credundum

Lucian of Samosata

Lucian, Vol. 1. Harmon, A. M., editor. London: William Heinemann, Ltd.; Cambridge, MA: Harvard University Press, 1913.

As for the verisimilitude of their slander, calum-

v.1.p.377
niators are not careless in thinking out that point; all their work centres on it, for they are afraid to put in anything discordant or even irrelevant. For example, they generally make their charges credible by distorting the real attributes of the man they are slandering. Thus they insinuate that a doctor is a poisoner, that a rich man is a would-be monarch, or that a courtier is a traitor.