He thought it was a most subtle job to discern what came first: self-centeredness or failure in seeing truth. Augustine wrote to Julian of Eclanum: Sed si disputatione subtilissima et elimatissima opus est, ut sciamus utrum primos homines insipientia superbos, an insipientes superbia fecerit (Contra Julianum, V, 4.18; PL 44, 795).