The answer is: Corinth

Acts 18: 8,9

Paul's time in Corinth was quite eventful, serving as a pivotal period in his life and ministry. This bustling city, known at the time for its thriving trade and cosmopolitan vibe, provided the perfect backdrop for Paul’s mission to spread the message of Christianity. Picture a place alive with people from various cultures, where Paul would frequently engage with diverse audiences— from the wealthy, laser-focused on material success, to the impoverished seeking hope.

When the Lord spoke to Paul in a vision while he was in Corinth, it's crucial to note that Paul faced significant challenges. He faced opposition and even threats against his safety. But rather than causing him to retreat, this divine encouragement bolstered his resolve. The Lord's knowledge that "I have many people in this city" reassured Paul of God’s presence and purpose, indicating that there were many hearts ready to receive the message he carried.

Interestingly, this vision-like experience reflects a few key biblical themes. It reminds us of another notable moment when a character received heavenly encouragement—think of Joshua at the brink of entering Canaan! Throughout scripture, we often see God providing reassurance when His prophet might be feeling uncertain or overwhelmed.

So, as we delve into Paul's journey, let’s see not just a man on a mission, but a dynamic exchange between divine guidance and human activity, illustrating a broader narrative of striving amidst adversity.