Lying is a disgraceful vice, and one that Plutarch paints in most disgraceful colors, when he says that it is "affording testimony that one first despises God, and then fears men." It is not possible more happily to describe its horrible, disgusting, and abandoned nature; for can we imagine anything more vile than to be cowards with regard to men, and brave with regard to God.
Michel de MontaigneAs for our pupils talk, let his virtue and his sense of right and wrong shine through it and have no guide but reason. Make him understand that confessing an error which he discovers in his own argument even when he alone has noticed it is an act of justice and integrity, which are the main qualities he pursues; stubbornness and rancour are vulgar qualities, visible in common souls whereas to think again, to change one's mind and to give up a bad case on the heat of the argument are rare qualities showing strength and wisdom.
Michel de Montaigne