As was usually the case in other cities, after Paul had preached Christ to the Jews in the synagogue at Corinth, the Jews expressed their contempt for what he preached (Acts 18:6), so Paul left them and joined himself with those Jewish and gentile brethren he was able to reach while preaching Christ each Sabbath at the synagogue (Acts 18:7-8).
Paul had a vision at Corinth (Acts 18:9-10) whereby Jesus encouraged him to continue preaching, for, not only would no harm come to him, but God had chosen many people in that city. Therefore, Paul remained there reasoning and persuading others for 1 ½ years about those things that pertain to Jesus’ crucifixion and resurrection and what this means in terms of good news (the Gospel) to mankind (Acts 18:11). Paul was also encouraged with the arrival of Silas and Timothy who brought word of the faithfulness of the brethren at Thessalonica (1Thessalonians 3:6-10), and it was during his stay here in Corinth that he wrote his first letter to them.
As was often the case in other cities Paul visited, the Jews were quite unhappy with his success in reaching out to the gentiles in the name of the God of Israel. On this occasion, however, things would be quite different. One Gallio, the brother of Seneca, philosopher and advisor to Caesar, was the proconsul of Achaia and at that time in Corinth. The Jews brought Paul before him to accuse him of unlawful matters pertaining to their religion. However, Gallio would have none of it, probably having in mind that Claudius had recently expelled the Jews from Rome for matters such as these (Acts 18:2), he simply refused to hear them, saying Jewish religious matters were not his concern (Acts 18:12-15).
This surprising development gave Paul great freedom to continue laboring in the Gospel at Corinth for some time afterward. Eventually, however, he took his leave for Syria. Priscilla and Aquila accompanied him as far as Ephesus (Acts 18:18).