knave, n.All

A Knave (n.) is ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠the greatest dupe even if never caught: he has sold the invaluable enjoyment of a character with himself for worthless toys and gewgaws.

A Knave (n.) is ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠betrayed by his own maxims, however cunning: he means to cheat with moderation, then a tempting incident occurs, nature is frail, and he walks into a snare that costs him all future trust.