profitable but necessary, dishonest and foul.

But let us proceed in our examples of treachery two pretenders to the
kingdom of Thrace--[Rhescuporis and Cotys. Tacitus, Annal., ii. 65]--
were fallen into dispute about their title; the emperor hindered them
from proceeding to blows: but one of them, under colour of bringing
things to a friendly issue by an interview, having invited his competitor
to an entertainment in his own house, imprisoned and killed him. Justice
required that the Romans should have satisfaction for this offence; but
there was a difficulty in obtaining it by ordinary ways; what, therefore,
they could not do legitimately, without war and without danger, they
resolved to do by treachery; and what they could not honestly do, they
did profitably. For which end, one Pomponius Flaccus was found to be a
fit instrument. This man, by dissembled words and assurances, having
drawn the other into his toils, instead of the honour and favour he had
promised him, sent him bound hand and foot to Rome. Here one traitor
betrayed another, contrary to common custom: for they are full of
mistrust, and 'tis hard to overreach them in their own art: witness the
sad experience we have lately had.--[Montaigne here probably refers to
the feigned reconciliation between Catherine de Medici and Henri, Duc de
Guise, in 1588.]

Let who will be Pomponius Flaccus, and there are enough who would: for my
part, both my word and my faith are, like all the rest, parts of this
common body: their best effect is the public service; this I take for
presupposed. But should one command me to take charge of the courts of
law and lawsuits, I should make answer, that I understood it not; or the
place of a leader of pioneers, I would say, that I was called to a more
honourable employment; so likewise, he that would employ me to lie,
betray, and forswear myself, though not to assassinate or to poison, for