Book V

Augustine opens with a prayer asking God to accept his confessions, asserting that God's knowledge encompasses all hidden things and that confession should lead the soul to love and praise God.

Augustine reflects on how even those who flee from God's presence cannot escape Him, and that they stumble upon Him against their will; true conversion comes when sinners recognize God's presence in their heart.

Augustine introduces Faustus, a famous Manichaean bishop known for eloquent speech, though Augustine notes he valued the content of learning over mere rhetoric.

Augustine compares pagan philosophers favorably to Manichaean doctrines, noting that philosophers achieved knowledge about the physical world while Manichaeans could not.

Augustine praises pagan philosophers for accurately predicting eclipses but criticizes their pride and failure to recognize God as the source of their knowledge or to worship Him properly.

Augustine discovered through personal study that Manichaean teachings about celestial phenomena contradicted his own observations and the calculations found in secular philosophical works.

Augustine asserts that knowing God is more important than understanding the natural world, and that even ignorance about nature is preferable to knowledge without piety and gratitude toward God.

Augustine criticizes Faustus and other Manichaean teachers for claiming authority on matters they do not understand, particularly celestial phenomena, and attributes this to sacrilegious pride.

Augustine distinguishes between a Christian's innocent ignorance about natural philosophy and a false teacher's arrogant misrepresentation, which damages faith.

Augustine recounts how for nine years he and other Manichaeans eagerly anticipated Faustus's arrival, hoping he would resolve their doctrinal difficulties.

When Faustus finally arrived, Augustine found him eloquent but ultimately offering nothing new; elegant speech cannot compensate for lack of substance.

Though disappointed by Faustus's ignorance of liberal sciences, Augustine finds him preferable to other teachers because he honestly admits what he does not know rather than pretending to knowledge.

The discovery of Faustus's ignorance leads Augustine to lose confidence in Manichaean teachings generally, though he does not immediately abandon the sect, instead seeking something better.

Augustine reflects on how God providentially led him to Rome, though Augustine attributes his move to earthly concerns like better student discipline rather than recognizing God's hand.

Augustine explains that he sought Rome primarily for the peaceful study conditions and disciplined student behavior, contrasting them with the unruly scholars of Carthage.

Augustine confesses to deceiving his devoted mother Monica about his departure, lying about a friend's needs so he could abandon her without permission.

Augustine recounts how his mother Monica wept and prayed for him even after he left, though God did not grant her specific request that he not sail, instead answering the deeper desire of her heart.

Augustine fell gravely ill in Rome, approaching death while still in sin and with Manichaean heretical beliefs, unable to recognize his peril.

Augustine attributes his physical recovery to God's compassion and his mother's incessant prayers, though he remained spiritually blind and even scoffed at God's remedies.

Augustine extols his mother's virtue—her almsdeeds, church attendance, and unceasing prayers—and questions whether God could refuse such a devoted woman.

Even after recovering in Rome, Augustine joined Manichaean communities and continued believing their doctrine that evil is an external substance, not an act of the will.

Augustine explains that he could not conceive of spiritual or immaterial substance, leading him to visualize God and evil as competing physical masses, and preventing him from understanding the incorporeal nature of sin.

Disappointed with Manichaean doctrines, Augustine begins favoring Academic skepticism, which holds that nothing can be known with certainty, though he doesn't understand it fully.

Augustine's inability to think of anything non-corporeal prevents him from understanding Catholic theology properly, especially regarding God's nature and Christ's incarnation.

Augustine recalls how he was stirred by Helpidius's scriptural defenses against Manichaean objections, though the Manichaeans' private responses to him seemed weak.

Augustine discovers that while Rome has fewer disruptive outbursts than Carthage, students there evade paying tuition by conspiring to move to other teachers, a form of dishonesty he despises.

When Milan's officials requested a rhetoric teacher through Rome's prefect, Augustine applies and is sent to Milan, unknowingly moving toward his conversion.

Augustine first approaches Ambrose not as a seeker of truth but as a critic of his eloquence, listening to evaluate his speaking style rather than his message.

Despite his initial skepticism, Augustine finds that Ambrose's words convey both eloquence and truth together, and he gradually begins to see that the Catholic faith can be rationally defended.

Influenced by Ambrose and philosophical reflection, Augustine concludes that Manichaeanism should be abandoned, especially after seeing that Catholic doctrine can be reasonably defended.