When the Jews were prisoners of the King of Babylon, they sent a message to the Jews of Jerusalem, saying, Pray for the life of Nebuchadnezzar, King … - Petr Chelčický

And he says about the Christian discipline that when the soldiers came to John to be baptized saying, “And we, what must we do?” John should he have given them another answer: “Throw your weapons away, give up war service, wound and kill no one.” According to these arguments, it would seem necessary for the Roman Church to fight, to shed human blood, and to gain peace by the sword… For this reason there is a need of soldiers who would go to war for the Holy Church and for Country.

Facts witness to the reality that [Christians] have abandoned God, that they have entered the world and become one with the world. Whatever the world considers praiseworthy – vanity, comfort, wealth, fancy notions, blasphemies – the Christians, too, praise with one accord, quite blatantly without shame and without conscience. We can find with difficulty one man in a thousand who does not conform himself to the world.

Wars and other kinds of murder have their beginning in the hatred of the enemy and in the unwillingness to be patient with evil. Their root is in intemperate self-love and in immoderate affection for temporal possessions. These conflicts are brought into this world because men do not trust the Son of God enough to abide by his commandments.