The other things which the worshipper of God ought to observe are easy, when these virtues are comprehended, that no one should ever speak falsely for the sake of deceiving or injuring. For it is unlawful for him who cultivates truth to be deceitful in anything, and to depart from the truth itself which he follows. In this path of justice and all the virtues there is no place for falsehood.
Lactantius, The Divine Institutes 6.18