Mercy over justice
The bishop has the law on his side: Valjean stole from him, and the gendarmes have caught him. Instead, Bienvenu tells the officers the silver was a gift and adds the candlesticks, worth two hundred francs, to the haul. He does this not because Valjean deserves it but because Valjean does not, because mercy that is earned is just wages, not mercy. The whole novel is built on this single act. Every good thing Valjean later does is an attempt to answer it, and every cruelty Javert commits is an attempt to enforce the logic the bishop refused. Hugo's point is that the law can punish a man forever without changing him, and that one undeserved kindness can.
Characters:Jean ValjeanMonseigneur BienvenuJavert