I can give his humour the true bent There are two senses in which Decius will give Caesar's disposition the right direction, "the true bent": 1) Because Caesar loves to be flattered—even when he most denies it—Decius will appeal to his true, natural disposition to be flattered. 2) By flattering him, Decius will make Caesar want to go in the right direction for the conspirators—to the Capitol, where they will murder him.