Full Idea
The distinctive mark of the Truth we hold ought to be virtue, which is the most exacting mark of Truth, the closest one to heaven and the most worthy thing that Truth produces.
Gist of Idea
Virtue is the distinctive mark of truth, and its greatest product
Source
Michel de Montaigne (Apology for Raymond Sebond [1580], p.0493)
Book Reference
Montaigne,Michel de: 'The Complete Essays', ed/tr. Screech,M.A. [Penguin 1987], p.493
A Reaction
A long way from Tarski and minimalist theories of truth! But not so far from pragmatism. Personally I think Montaigne is making an important claim, which virtue theorists should be attempting to incorporate into their theory. Aristotle would sympathise.