If you tell a lie, you commit an immoral act. But what if you just believe something that turns out to be false? Is that evil? Augustine thought so. He didn't think an intententional lie was the same as an unintentional false belief but both are evil. How so? Surely a mistaken belief isn't evil, is it? Augustine distinguished between moral evil and metaphysical evil. Augustine thought that to believe some false proposition may not be a sin if it is believed unintentionally, but it is nonetheless a metaphysical evil, a lack, or a corruption, of the good. Lying, on the other hand, is a moral evil since it is carried out intentionally. Augustine's view of falsehood and lying derived from his theological vision. For Augustine, God is supremely truthful: He is truth and, consequently, internally harmonious. Therefore, for creation to function properly, it must function in harmony with its creator. False beliefs are contrary to the thoughts of God, to his design for th...