Soliloquies
Augustine's early dialogue with Reason on the knowledge of God and the soul, containing claims he later retracted.
Preface and Praise of Sacred Scripture
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Chapter V: On the Dispositions Required for This Study
— Cited (then retracted): "God, who willed that only the pure of heart should know the truth"
"St. Augustine had said in the Soliloquies: God, who willed that only the pure of heart should know the truth"