A short Latin treatise, written before Tertullian's turn to Montanism, that argues repentance is a one-time discipline sealed by baptism but grants a single, harshly demanding second chance called exomologesis.
De Paenitentia ("On Repentance") is a twelve-chapter treatise in which Tertullian sets out what repentance is, why God demands it, and how far its mercy extends. He opens by distinguishing pagan repentance -- an irrational regret that even second-guesses good deeds -- from the reasoned repentance available only to those who know God, since "reason belongs to God" and no one ignorant of God can rightly judge what counts as sin. He then works through the full ground a Christian is answerable for: sins of both flesh and spirit, of deed and of mere will, since God who made both substances judges both equally.
The treatise unfolds toward a clear rule: baptism grants one clean wiping-out of sin, and that repentance, once undertaken, should never be repeated by a return to the offense. Tertullian is scathing toward converts who "presume upon" baptism as a license to keep sinning in the meantime, and toward hearers who imagine some lesser standard applies to them before the water. But he then makes his most striking concession: because God foresaw the devil's unrelenting assault on the forgiven, he has left one door still open in the vestibule after baptism -- a second, final repentance, available only once. That second repentance must be enacted, not merely felt, through a public discipline he names by its Greek term, exomologesis: sackcloth, ashes, fasting, prostration before the presbyters, and open confession before the whole congregation, however much shame that costs.
Written while Tertullian was still within the mainstream church (later, as a Montanist, he would deny that the church had power to forgive a second time at all in De Pudicitia), De Paenitentia is a foundational document for the early Latin theology of post-baptismal sin and public penance. It shows a rigorist not yet at his most rigorist: still willing to grant sinners a second remedy, but only one, and only paid for in public humiliation -- a discipline that shaped how the early Latin church would handle grave sin for centuries.
“For reason belongs to God, since God, the founder of all things, has foreseen, arranged, and ordered nothing without reason, and has willed nothing to be handled or understood except by reason.”
— De Paenitentia – Chapter 1
“This will lift you, submerged in the waves of your sins, and haul you safely into the harbor of divine clemency.”
— De Paenitentia – Chapter 4
“has still allowed something to remain open: he has stationed a second repentance in the vestibule, to open to those who knock”
— De Paenitentia – Chapter 7
“In one person and another the church exists, and the church is Christ: therefore, when you stretch yourself out at the knees of the brothers, it is Christ whom you touch, Christ to whom you make your plea; likewise when they weep on your behalf, it is Christ who suffers, Christ who pleads with the Father.”
— De Paenitentia – Chapter 10
“So then, the more it casts a man down, the more it lifts him up; the more squalid it makes him, the cleaner it renders him; the more it accuses, the more it excuses; the more it condemns, the more it absolves.”
— De Paenitentia – Chapter 9
Exomologesis is Tertullian's Greek term for the public, bodily act of confession required for the second post-baptismal repentance. It involves lying in sackcloth and ashes, plain food and drink, fasting, prostration before the presbyters, and kneeling at the altars while the whole congregation is enlisted in one's supplication. Tertullian describes it as a discipline that humbles the body precisely so that it may lift the soul.
Yes, but only once beyond baptism. He holds that baptism grants one full wiping-out of past sin, and that repentance is meant to be undertaken and then held to for good. Because he recognizes the devil never stops attacking the forgiven, he allows a single further repentance after baptism, enacted through exomologesis, but insists there is no third chance.
He argues the will is the origin of every deed, so it bears the greater share of guilt even when circumstance prevents the act itself. He cites Christ's teaching that a man who looks at a woman with lust has already committed adultery in his heart, concluding that intending evil and failing to carry it out is no defense at all.
He condemns hearers who "presume on baptism," treating the certainty of future pardon as a furlough to keep sinning until the water washes it away. He insists true fear of the Lord should follow immediately from knowing him, and that hearers ought to long for baptism rather than presume upon it, since presumption itself shows a lack of the fear that makes repentance genuine.
He argues that concealing sin only hides it from other people, not from God, and that shame before fellow believers is far less costly than being secretly condemned. Since he holds that "the church exists" in its members and "the church is Christ," confessing before the brothers is, for him, the same as confessing directly to Christ.
He points to the letters to the seven churches in Revelation, where the Spirit rebukes and yet calls each church back to repentance, and to the parables of the lost coin, the lost sheep, and the prodigal son. He also cites Nebuchadnezzar, restored to his kingdom after seven years of penitence, as a historical proof that God honors confession even after severe apostasy.
No. De Paenitentia was written while Tertullian was still within the broader church and reflects a comparatively moderate position that allows one second repentance. Later, after aligning with the New Prophecy (Montanism), he wrote De Pudicitia taking a harsher line, denying that the church has authority to forgive certain grave sins a second time at all.
Tertullian addresses it especially to catechumens and new converts, whom he calls "novices... like puppies still fresh from infancy with their eyes not yet fully opened." He is concerned that they misunderstand baptismal grace as license rather than as a debt of fear and discipline owed to God.
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