Richard Nokes wonders about medieval honesty:
"I've started thinking about... medieval texts, and I'm having trouble thinking of ones in which honesty is portrayed as an important virtue. Sagas are basically out as an entire genre, given the praise of trickiness of the heroes. Patient Griselda's husband may be the Christ figure, but he's also a terrible liar, as are many other of Boccaccio's characters. Unless I'm forgetting something, I can't think of a single Canterbury Tale in which honesty is a virtue. I assume that somewhere in saints lives are those praised for their honesty, but all I can think of is Judith.Nokes is right, and the reason is because western medievalism was heavily shame-based by post-Reformationist standards. Doctrinal examples abound: Anselm's satisfaction model of Christ's death (emphasizing atonement to restore God's honor) contrasts with the later Protestant penal substitution model (advocating atonement for the sake of justice). And naturally, the more "honor-shame" your outlook, the more lies and deceptions become acceptable.
I'm not trying to suggest that honesty was not a medieval virtue, but I suspect that it was not a particularly important virtue. Loyalty, fidelity, piety, chastity ... these seem to be the prime virtues of the literature. Liars are punished in the Inferno, but nothing like traitors are."
When we say that honesty is a western virtue, it needs to be qualified with the cliche that everything is relative. Medieval Europe may have valued honesty more than places like the Mediterranean did, but to later Protestants -- and certainly to today's secularists -- they seem pretty, well, "medieval" indeed.
(Hat-tip: Stephen Carlson for the reference.)