34. Remember, too, beloved sons, that the Church is rightly compared to an army in battle array "sicut castrorum acies ordinata,"²³ because it is her mission to combat the enemies, visible and invisible, of God and men's souls. Wherefore did St. Paul recommend Timothy to bear himself "as a good soldier of Jesus Christ?"²⁴ Now, that which constitutes the strength of an army and contributes most to its victory is discipline and the exact and rigorous obedience of all toward those in command.