When Christian Bale landed the part of Moses in Ridley Scott’s “Exodus: Gods and Kings”, the latest epic from the British director, he found unlikely inspiration in Monty Python’s irreverent comedy film “Life of Brian”. The 40-year-old Bale had just finished filming “American Hustle” and was not in the best physical shape to play Moses, who was personified by the commanding figure of Charlton Heston in Cecil B. DeMille’s “The Ten Commandments” in 1956.