When several client kings came to Rome to pay their respects to him and argued about their nobility of descent, he allegedly cried out the Homeric line: "Let there be one lord, one king." In 40, Caligula began implementing very controversial policies that introduced religion into his political role. Caligula began appearing in public dressed as various gods and demigods such as Hercules, Mercury, Venus and Apollo. Reportedly, he began referring to himself as a god when meeting with politicians and he was referred to as "Jupiter" on occasion in public documents.