Against Julian 6.24.75

The expression ‘in whom all sinned’ is used as though it said ‘because of which all sinned,’ just as it says, ‘By what does a young man correct his way?’ (Romans 5:12; Psalm 119:9, LXX/Vulgate Psalm 118:9)

Augustine reports Julian’s interpretation: all people are not to be understood as having sinned originally in one man, together as though united in a single mass. Rather, they sin because the first man sinned—by imitating him, not by being born from him.