 Jesus is identified with the Word ("Logos"), and the Word is identified with "theos" ("god" in Greek); no such identification is made in the Synoptics.In Mark, Jesus urges his disciples to keep his divinity secret, but in John he is very open in discussing it, even referring to himself as "I AM", the title God gives himself in Exodus at his self-revelation to Moses.In the Synoptics, the chief theme is the Kingdom of God and the Kingdom of Heaven (the latter specifically in Matthew), while John's theme is Jesus as the source of eternal life and the Kingdom is only mentioned twice.