Then Paul left Athens and went to Corinth. There he became acquainted with a Jew named Aquila, born in Pontus, who had recently arrived from Italy with his wife, Priscilla. They had left Italy when Claudius Caesar deported all Jews from Rome. Paul lived and worked with them, for they were tentmakers just as he was. Each Sabbath found Paul at the synagogue, trying to convince the Jews and Greeks alike. And after Silas and Timothy came down from Macedonia, Paul spent all his time preaching the word. He testified to the Jews that Jesus was the Messiah. But when they opposed and insulted him, Paul shook the dust from his clothes and said, “Your blood is upon your own heads—I am innocent. From now on I will go preach to the Gentiles.” Then he left and went to the home of Titius Justus, a Gentile who worshiped God and lived next door to the synagogue. Crispus, the leader of the synagogue, and everyone in his household believed in the Lord. Many others in Corinth also heard Paul, became believers, and were baptized. One night the Lord spoke to Paul in a vision and told him, “Don’t be afraid! Speak out! Don’t be silent! For I am with you, and no one will attack and harm you, for many people in this city belong to me.” So Paul stayed there for the next year and a half, teaching the word of God. (‭Acts of the Apostles‬ ‭18‬:‭1-11‬ NLT)

Paul was still without Silas and Timothy as he left Athens and came to Corinth. These two cities were in the southern peninsula region of Greece called Achaia. They were both major cities in Greece. Corinth had a population of about 600,000 people. This was the second largest city in the Roman Empire. Corinth was a multi-cultural, bustling city of commerce. It's location gave it the opportunity for great economic growth since it was on a body of Land only about four miles across. Ships could dock on one side and unload cargo to a land vessel which would cart it across the four mile trek and reload a ship with the cargo. This saved Mariners significant travel time as they wouldn't have to navigate around the peninsula.
Corinth was a very perverse society with a temple dedicated to the Greek goddess of love called Aphrodite. Prostitutes were available at her temple for ones own desire. Economically, boundaries were bulging. The city was easy to defend and it became a very progressive environment. Intoxicated with success, it became enslaved in materialism and Hedonism (pleasure seeking). This sounds a lot like America today.
This was a challenging city for evangelism, yet it was also a prime place for it. What good is light if it isn't exposed to darkness? What good is salt if it stays in the shaker? (See Matthew 5:13-16).
Paul met Aquila and Priscilla here in Corinth. They were originally from Pontus, the northeastern area of Turkey (former Asia Minor). They had lived in Rome but had been deported by the Roman Emperor Claudius when he removed all Jews from the city.
Paul worked with them in the tent maker industry ( some would say leather work and others would say they made prayer shawls). Nonetheless, they worked in this trade for a living. We read of these two in other passages of Scripture. They were strong, leading believers who hosted churches in their home since there were no churches available to attend (see Acts 18:18,26; Romans 16:3; I Corinthians 16:19; and 2 Timothy 4:19). Every Sabbath, Paul would meet with the Jews and God-fearing Greeks to share the gospel of Jesus Christ. After Silas and Timothy arrived, he spent all of his time preaching and teaching. Perhaps Silas and Timothy helped provide the financial support needed to free Paul to preach and teach. When many of the Jews opposed and insulted him, he shook the dust off his garment to state their rejection of Jesus the Messiah and his clear conscience of proclaiming the truth. (see Matthew 10:14; Mark 6:11; Luke 9:5). He, then, turned to the Gentiles. Titius Justus was a Gentile who believed and who also lived next to the Synagogue. Crispus, the Synagogue leader, came to faith in Jesus as well as everyone in his household. Many others in Corinth came to faith in Christ and were baptized. Paul had a vision from God that reassured him that no one was going to hurt him in this city and that many in the city would come to the Lord. What a comfort! This had to be tremendously encouraging to Paul after he had been assaulted in some way or another in practically every city.
For a year and a half he stayed in Corinth preaching and teaching.