Christ reveals himself throughout his earthly life as the Saviour sent by the Father for the salvation of the world. His very name, "Jesus", expresses this mission. It actually means: "God saves". It is a name he was given as a result of heavenly instruction: both Mary and Joseph (Lk 1:31; Mt 1:21) receive the order to call him by this name. In the message to Joseph the meaning of the name is explained: "for he will save his people from their sins".2. Christ defines his saving mission as a service whose highest expression will be the sacrifice of his life for mankind: "For the Son of man also came not to be served but to serve, and to give his life as a ransom for many" (Mk 10:45; Mt 20:28)