Acts 18

Introduction

Acts 18 recounts an important stage in Paul's second missionary journey, centered on his extended ministry in Corinth, a major city of the Roman Empire. Arriving alone after a discouraging experience in Athens (Acts 17:16-34), Paul finds new partners in Aquila and Priscilla, Jewish tentmakers recently expelled from Rome. The chapter follows Paul's familiar pattern of beginning in the synagogue, meeting Jewish opposition, and then turning to the Gentiles. Here, however, the Lord speaks to Paul in a night vision, promising protection and revealing that he has "many people in this city." That encouragement leads to an extended stay of eighteen months, during which a church is established.

The chapter also records Paul's appearance before Gallio, the Roman proconsul of Achaia, whose dismissal of the Jewish charges against him effectively established that Christianity was not a criminal matter under Roman law. The final section introduces Apollos, an eloquent Alexandrian Jew whose incomplete understanding of the faith is gently corrected by Priscilla and Aquila, a scene that highlights the role of lay believers in theological instruction and the continuing importance of accurate teaching about Jesus. Throughout the chapter, Luke brings together themes of divine providence, the relationship between Judaism and the emerging church, Christian partnership in ministry, and the sovereignty of God over the spread of the gospel.

Paul Arrives in Corinth and Meets Aquila and Priscilla (vv. 1-4)

Notes

The verb χωρισθείς ("having departed") in verse 1 comes from χωρίζω, which means "to separate" or "to depart." It may suggest a decisive break rather than an ordinary departure. Corinth was the capital of the Roman province of Achaia, a commercial center situated on a narrow isthmus connecting mainland Greece to the Peloponnese. It was known for its wealth, its two harbors (Lechaeum on the west and Cenchrea on the east), and its moral reputation -- "to live like a Corinthian" was a Greek idiom for living in debauchery.

The reference to Emperor Claudius' edict expelling Jews from Rome is corroborated by the Roman historian Suetonius, who writes that Claudius expelled the Jews because they were "constantly making disturbances at the instigation of Chrestus" (Claudius 25.4). A common proposal is that "Chrestus" is a garbled reference to "Christus" — Christ — suggesting the expulsion was triggered by disputes within Rome's Jewish community over whether Jesus was the Messiah. The identification remains debated: some read "Chrestus" as an otherwise unknown agitator, and the precise circumstances behind the edict are uncertain. If the Christ-connection is correct, the edict is generally dated to around AD 49, which would help establish the chronology of Paul's ministry.

The word ὁμότεχνον ("of the same trade") appears only here in the New Testament. The noun σκηνοποιοί ("tentmakers") literally means makers of tents or leather goods. In rabbinic tradition, every Jewish boy was expected to learn a trade regardless of his education, and Paul's willingness to work with his hands was a consistent part of his apostolic practice -- he supported himself so as not to burden the churches he served (1 Corinthians 9:12-18, 1 Thessalonians 2:9, 2 Thessalonians 3:8).

The imperfect tense of διελέγετο ("was reasoning" or "was discussing") marks a habitual weekly practice, and the verb itself implies a dialogical style — not mere lecturing but engaged argument. The combination Ἰουδαίους καὶ Ἕλληνας ("Jews and Greeks") shows that Corinth's synagogue drew both Jews and Greek God-fearers — the same mixed audience Luke has described throughout Paul's journeys.

Silas and Timothy Arrive; Paul Turns to the Gentiles (vv. 5-8)

Notes

The arrival of Silas and Timothy from Macedonia (see Acts 17:14-15) marks a turning point. The Greek συνείχετο τῷ λόγῳ is rendered variously: "was compelled by the word" or "devoted himself fully to the word." The verb συνέχω means "to constrain, press, or hold together." Paul was gripped by the urgency of preaching. Their arrival likely also brought financial support from the Macedonian churches (2 Corinthians 11:9, Philippians 4:15), freeing Paul from tentmaking to devote himself more fully to proclamation.

Paul's testimony that εἶναι τὸν Χριστὸν Ἰησοῦν -- "the Christ was Jesus" -- places the predicate "Christ" (Messiah) first for emphasis. The central claim is that the long-awaited Messiah of Israel's Scriptures is none other than Jesus of Nazareth.

The shaking out of garments in verse 6 is a prophetic symbolic act, echoing Nehemiah 5:13 and Jesus' instructions in Matthew 10:14. The verb βλασφημούντων ("blaspheming") indicates that the opposition went beyond intellectual disagreement to reviling -- likely cursing the name of Jesus. Paul's declaration "Your blood be upon your own heads" echoes Ezekiel 33:4 and the language of the watchman who has faithfully delivered his message and is therefore καθαρός ("clean" or "innocent") of responsibility for those who refuse to listen. This is the third time in Acts that Paul turns from Jewish audiences to Gentiles (see Acts 13:46, Acts 28:28), though in each case he later resumes synagogue ministry in a new city.

The name in verse 7 has a textual variant: the critical text (ECM) reads Τιτίου Ἰούστου ("Titius Justus"), while the Byzantine text reads simply "Justus." The full name is Roman, suggesting a Roman citizen and Gentile God-fearer. That his house lay συνομοροῦσα τῇ συναγωγῇ ("adjacent to the synagogue") is striking: Paul's new base of operations was literally next door to the place that had just rejected him.

Crispus the ἀρχισυνάγωγος ("synagogue ruler") is mentioned by Paul in 1 Corinthians 1:14 as one of the few people Paul personally baptized in Corinth. His conversion with his entire household would have been a serious blow to the synagogue's leadership and a notable testimony to the Corinthian community.

The Lord's Vision to Paul (vv. 9-11)

Notes

The vision draws on the language of divine reassurance familiar from the Old Testament. "Do not be afraid" (μὴ φοβοῦ) recalls God's words to Abraham (Genesis 15:1), Isaac (Genesis 26:24), and Jeremiah (Jeremiah 1:8). The combination of λάλει καὶ μὴ σιωπήσῃς ("keep speaking and do not be silent") uses a positive command followed by a negative -- a rhetorical intensification. The shift from present imperative (λάλει) to aorist subjunctive (σιωπήσῃς) suggests "do not ever fall silent," with the aorist conveying a comprehensive prohibition.

The promise ἐγώ εἰμι μετὰ σοῦ ("I am with you") is the language of the divine presence formula found throughout Scripture (Exodus 3:12, Joshua 1:5, Isaiah 41:10, Matthew 28:20). That the risen Lord Jesus speaks these words places him in the role of Yahweh himself.

λαός ἐστί μοι πολὺς ἐν τῇ πόλει ταύτῃ — "I have many people in this city" — carries theological weight. The word λαός ("people") is the standard Septuagint term for God's covenant people Israel. Its use here for people in pagan Corinth who have not yet believed is striking: God already claims them as his own. The statement looks forward to their future conversion, grounding Paul's ministry in divine foreknowledge and purpose.

Paul's eighteen-month stay (roughly AD 50-52) was among his longest in any single city and likely produced important correspondence. During this period he likely wrote 1 and 2 Thessalonians, and the church he founded later became the recipient of his longest surviving letters (1 Corinthians 1:1-2, 2 Corinthians 1:1).

Interpretations

The Lord's statement "I have many people in this city" is a key text in debates about divine sovereignty and human responsibility in salvation. Reformed and Calvinist interpreters see this as a clear expression of unconditional election: God has already chosen a people for himself in Corinth before they have come to faith, and Paul's preaching is the appointed means by which God's elect will be brought to belief. The verse parallels Jesus' language about his "sheep" who will hear his voice (John 10:16). Arminian interpreters, while acknowledging God's foreknowledge, typically understand the statement as referring to those whom God foreknew would freely respond to the gospel -- God knows who will believe and assures Paul that his labor will not be in vain. Both traditions agree that the vision demonstrates the inseparable connection between divine sovereignty and faithful human proclamation: God's purposes are accomplished through Paul's preaching, not apart from it.

Paul before Gallio (vv. 12-17)

Notes

Gallio was the brother of the philosopher Seneca and is well attested in ancient sources. An inscription found at Delphi dates his proconsulship of Achaia to approximately AD 51-52, making this an important chronological anchor for Pauline studies. His title ἀνθυπάτου ("proconsul") is correct for the governor of a senatorial province like Achaia -- a detail that confirms Luke's accuracy in using Roman political terminology.

The Jews' charge in verse 13 is ambiguous by design. The phrase παρὰ τὸν νόμον ("contrary to the law") could mean "contrary to Jewish law" or "contrary to Roman law." The accusers likely intended to suggest the latter -- that Paul was promoting an illicit religion not sanctioned by Rome -- since disputes about Jewish law would not concern a Roman magistrate.

Gallio's response is legally significant. He distinguishes between ἀδίκημα ("a wrongdoing" -- a civil or criminal offense) and ῥᾳδιούργημα πονηρόν ("a vicious crime" -- a serious criminal act) on the one hand, and ζητήματα ("questions" or "disputes") about λόγου καὶ ὀνομάτων ("words and names") on the other. By categorizing the matter as an internal Jewish religious dispute, Gallio effectively ruled that Christianity (as a sect within Judaism) was not a matter for Roman courts. The decision likely carried wider implications as a legal precedent, since Gallio was a prominent figure and his ruling would have been known in Rome.

The verb ἀπήλασεν ("drove away") in verse 16 is forceful -- Gallio did not merely dismiss the case but ejected the accusers from the tribunal.

The beating of Sosthenes in verse 17 is puzzling. The text simply says πάντες ("they all") seized him. If the crowd was Gentile, it may reflect anti-Jewish sentiment inflamed by the failed prosecution. If the crowd was Jewish, Sosthenes may have been beaten for failing to bring a successful case, or perhaps for showing sympathy toward Paul. A "Sosthenes" is named as co-sender of 1 Corinthians (1 Corinthians 1:1). If this is the same man, he eventually became a Christian, possibly influenced by the events described here. Gallio's indifference -- οὐδὲν τούτων τῷ Γαλλίωνι ἔμελεν ("none of these things mattered to Gallio") -- is Luke's understated comment on the limits of Roman justice.

Paul's Departure from Corinth and Return to Antioch (vv. 18-23)

Notes

The reference to Paul shaving his head at Cenchrea (the eastern port of Corinth) indicates a Nazirite-like vow (Numbers 6:1-21). The verb κειράμενος ("having shaved") is a middle participle, indicating Paul shaved his own head. In Jewish practice, when a person completed a vow (or when circumstances required it), the hair was cut and later offered at the temple in Jerusalem. The detail shows that Paul, despite insisting Gentiles need not observe the law, continued to practice Jewish customs voluntarily, consistent with his principle of becoming "all things to all people" (1 Corinthians 9:20-23).

The phrase τοῦ Θεοῦ θέλοντος ("if God wills") in verse 21 is a genitive absolute expressing a condition. This formula of submission to divine will became standard in early Christianity (James 4:15, 1 Corinthians 4:19) and reflects the deep conviction that all plans are subject to God's sovereign purposes.

Verse 22 is compressed but geographically significant. "He went up" (ἀναβάς) and "went down" (κατέβη) reflect the topography: one always "went up" to Jerusalem (which sits at a high elevation) and "went down" from it. The brief mention of greeting "the church" almost certainly refers to the Jerusalem church, marking the end of Paul's second missionary journey and his return to his sending church at Antioch.

Verse 23 marks the beginning of the third missionary journey. Paul travels καθεξῆς ("in order" or "one after another") through the Galatian region and Phrygia — areas he had evangelized on earlier journeys (Acts 16:6) — στηρίζων ("strengthening") the disciples. The verb implies not mere encouragement but steady theological grounding of the young churches.

Apollos in Ephesus (vv. 24-28)

Notes

Luke introduces Apollos with a cluster of credentials. He is Ἀλεξανδρεύς τῷ γένει ("Alexandrian by birth"), and Alexandria was a leading intellectual center of the Hellenistic world, home to the great library and a center of Jewish-Greek scholarship. Philo of Alexandria was its best-known Jewish intellectual, and the city held the largest Jewish population of any city in the ancient world outside Palestine. The adjective λόγιος ("eloquent" or "learned") can mean either skilled in speech or well educated; likely both are intended. He is also δυνατὸς ὢν ἐν ταῖς γραφαῖς ("powerful in the Scriptures"), indicating deep competence in the Old Testament.

The phrase κατηχημένος τὴν ὁδὸν τοῦ Κυρίου ("instructed in the way of the Lord") uses the verb from which we derive "catechism" -- it means to be orally instructed or taught by word of mouth. He was ζέων τῷ πνεύματι ("fervent in spirit"), where ζέων literally means "boiling." Whether "spirit" here refers to the Holy Spirit or to Apollos' own human spirit is debated, but the expression conveys intensity.

The puzzle of Apollos is that he taught ἀκριβῶς ("accurately") about Jesus yet knew only τὸ βάπτισμα Ἰωάννου ("the baptism of John"). He had received a form of the Jesus tradition rooted in John the Baptist's preparatory movement, but had not yet encountered the full apostolic teaching — the death and resurrection of Christ, the outpouring of the Spirit, and Christian baptism. This gap connects directly to the opening of Acts 19:1-7, where Paul meets disciples in Ephesus who likewise know only John's baptism.

Priscilla and Aquila's response is a model of pastoral sensitivity. The verb προσελάβοντο ("they took him aside") suggests a warm, private reception -- not a public correction. They explained ἀκριβέστερον ("more accurately" -- the comparative of the same adverb used to describe Apollos' own teaching) the way of God. Notably, Priscilla is named first, which many scholars take to indicate her more prominent role in the instruction. This is consistent with the pattern in Paul's letters, where Priscilla (Prisca) is frequently named before her husband (Romans 16:3, 2 Timothy 4:19).

In verse 27, the phrase τοῖς πεπιστευκόσιν διὰ τῆς χάριτος ("those who had believed through grace") is grammatically ambiguous: "through grace" could modify "believed" (they believed by means of God's grace) or "he helped" (he helped them by means of grace). Both are theologically true. The verb διακατηλέγχετο ("he was vigorously refuting") in verse 28 is a rare double compound found only here in the New Testament, intensifying the notion of thorough refutation. Apollos proved διὰ τῶν γραφῶν ("through the Scriptures") that the Christ was Jesus -- the same essential argument Paul had been making, now reinforced by another voice.

Apollos became a significant figure in the Corinthian church, prominent enough that some believers claimed him as their leader in the factional disputes Paul later addressed (1 Corinthians 1:12, 1 Corinthians 3:4-6). Paul himself held Apollos in high regard, describing their ministries as complementary: "I planted, Apollos watered, but God gave the growth" (1 Corinthians 3:6).