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Catholic Commentary
The Antichrist, Apostasy, and the Confession of the Son
18Little children, these are the end times, and as you heard that the Antichrist is coming, even now many antichrists have arisen. By this we know that it is the final hour.19They went out from us, but they didn’t belong to us; for if they had belonged to us, they would have continued with us. But they left, that they might be revealed that none of them belong to us.20You have an anointing from the Holy One, and you all have knowledge.2:20 Or, “know what is true”, or, “know all things”21I have not written to you because you don’t know the truth, but because you know it, and because no lie is of the truth.22Who is the liar but he who denies that Jesus is the Christ? This is the Antichrist, he who denies the Father and the Son.23Whoever denies the Son doesn’t have the Father. He who confesses the Son has the Father also.
1 John 2:18–23 warns that many antichrists opposing Christ are already present in the final age, revealed by their rejection of Christian community and denial that Jesus is the Christ incarnate. John assures believers that they possess the Holy Spirit's anointing and instinctive knowledge of truth, making them immune to such heresies and able to discern that denying the Son amounts to losing the Father.
The lie of the Antichrist is not distant apocalypse—it's the quiet denial that Jesus is God's Son, active right now, and every baptized Catholic already has the anointing to recognize it.
Verse 21 — "No lie is of the truth" This seemingly simple statement carries profound logical weight. John writes not to introduce new truth but to awaken his readers to what they already possess. The anointing has given them an instinct for truth — a kind of sensus fidei — so that when false teaching presents itself, the contradiction is discernible. Lies and truth are not gradations on a spectrum; they belong to categorically different orders of reality. Truth, in Johannine theology, is not merely propositional accuracy but a person — Jesus himself ("I am the way, the truth, and the life," Jn 14:6).
Verse 22 — "Who is the liar but he who denies that Jesus is the Christ?" Here John names the definitive lie: the denial of the Incarnation. The specific heresy in view is likely Cerinthian or proto-Gnostic — the claim that "Jesus" and "the Christ" were separable beings, that the divine Christ descended upon the human Jesus at baptism but departed before the crucifixion. John's rebuttal is categorical: to deny that Jesus is the Christ is to be the liar (ho pseudēs) — the definite article makes it archetypally the lie. And this Christological error is simultaneously Trinitarian: to deny the Son is to deny the Father, because the Father is only known through the Son (cf. Jn 1:18; 14:9).
Verse 23 — "Whoever denies the Son doesn't have the Father" The reciprocal structure — deny/lose; confess/receive — is a compressed creedal formula. The verb "confess" (homologeō, literally "to say the same thing") implies not merely intellectual assent but a public, liturgical, and life-orienting declaration. This verse anticipates and grounds the Church's Trinitarian theology: the Persons are mutually implying. Access to the Father is not available through a vague monotheism that bypasses the Son. The Incarnation is not a detour around God but the only road to him.
This passage is a foundational locus for several interconnected Catholic doctrines.
On the Antichrist and Eschatology: The Catechism teaches that before Christ's Second Coming "the Church must pass through a final trial that will shake the faith of many believers" and that "a religious deception offering men an apparent solution to their problems at the price of apostasy" will arise (CCC 675). John's "many antichrists" establishes the principle that Antichrist is not only a terminal figure but an active, ongoing spirit of deception in every era. St. Augustine identified the antichrists as all who bear Christ's name while opposing his truth (Tractates on 1 John, 3.4).
On the Chrisma — Baptism and Confirmation: The Fathers saw verse 20 as a direct reference to the sacramental anointing of the newly baptized. St. Cyril of Jerusalem (Mystagogical Catecheses, 3) explicitly connects the chrisma of this verse to the chrism used in Confirmation, calling it "the antitype of the Holy Spirit." The Second Vatican Council's Lumen Gentium (§12) echoes this in its teaching on the sensus fidei fidelium — the Spirit-guided instinct of the whole faithful to recognize and hold to revealed truth — which John anticipates here.
On Christology and the Trinity: The Council of Nicaea (325 AD) and later Chalcedon (451 AD) can be seen as the Church's formal, conciliar response to precisely the type of heresy John addresses here. To separate "Jesus" from "the Christ," or to dissolve the unity of the divine and human in the one Person, is the lie John identifies. John's axiom in verse 23 — that one cannot have the Father while denying the Son — directly undergirds Catholic teaching that "outside of Christ there is no access to the Father" (CCC 151) and that saving faith is irreducibly Christological and Trinitarian.
On Apostasy: The departure described in verse 19 is treated by the Fathers as a warning about the gravity of formal separation from the Church's confession. For St. Irenaeus (Against Heresies, III.11), those who deny the Incarnation sever themselves from the vine of life. This passage implicitly grounds Catholic teaching on the necessity of remaining within the unity of apostolic faith.
Contemporary Catholics face a landscape strikingly similar to John's: voices within and near the Church that, while often using Christian language, quietly detach Jesus from his full identity as the eternal Son of God — reducing him to a teacher, a symbol, a social reformer, or a cipher for personal spirituality. John's word to his community is also his word to ours: you already have the anointing. The Sacraments of Baptism and Confirmation are not decorative rites but the deposit of a truth-discerning Spirit within every believer. This means Catholics are not passive recipients of official teaching alone but active bearers of a sensus fidei — an inner spiritual instinct — that can recognize when something taught in Christ's name contradicts Christ himself.
Practically, this passage invites Catholics to examine their own confession. Do I confess — publicly, habitually, not only in the Creed at Mass but in conversation, in choices, in how I speak of Jesus — that he is the Christ, the Son of God? Am I willing to name clearly what contradicts this, charitably but without ambiguity? John shows that Christian love does not collapse into indifference to truth; the most loving act toward someone in error is the clear, gentle, Spirit-grounded witness to who Jesus truly is.
Commentary
Verse 18 — "Little children, these are the end times" John's characteristic address, teknia ("little children"), signals both pastoral tenderness and apostolic authority. His declaration that it is "the final hour" (eschate hora) does not mean John expected the world to end imminently in a purely chronological sense. Rather, in the New Testament's realized eschatology, the "last times" began with the Incarnation (cf. Heb 1:2; Acts 2:17). The Church perpetually inhabits this eschatological moment. The "Antichrist" (antichristos) is a term unique in the New Testament to the Johannine letters. The singular figure "coming" likely reflects an already-circulating tradition — possibly connected to the "man of lawlessness" of 2 Thessalonians 2 or the beasts of Revelation. But John's pastoral concern is immediate and corporate: many antichrists are already active, and their presence is itself the proof that the final age is underway. The Antichrist is therefore not only an apocalyptic individual but a spiritual principle of opposition to Christ already operative in history.
Verse 19 — "They went out from us, but they didn't belong to us" This verse reconstructs a painful moment of community fracture. A group — almost certainly the early proto-Gnostic or docetist teachers whom John combats throughout this letter — had formally separated from the Johannine churches. John's theological reading of their departure is precise: their leaving revealed (phanerōthōsin) what was always true — they were never truly of the community. This is not a crude predestinarianism but a statement about the nature of authentic belonging. Communion (koinōnia), for John, is ontological before it is social: it is rooted in shared faith in Jesus as the Christ come in the flesh (cf. 1 Jn 4:2). Those who depart from this confession depart from the very ground of ecclesial unity. The word "continued" (memenēkeisan, from menō, "to remain/abide") is theologically loaded in Johannine literature — abiding is the hallmark of genuine discipleship (cf. Jn 15:4–10).
Verse 20 — "You have an anointing from the Holy One" The Greek chrisma ("anointing") echoes the word Christos ("Anointed One"), creating a deliberate wordplay. The faithful have been anointed — by the Holy Spirit received in Baptism and Confirmation — by the very "Holy One," Christ himself. This anointing is not an elite spiritual gift reserved for a few; John insists of his readers share in it ("you all have knowledge"). This is a direct counter to the Gnostic claim that a special (secret knowledge) was available only to the spiritually enlightened. John democratizes saving knowledge: it belongs to every baptized believer as such.