How do we know that God calls us to share the gospel?

In Acts 16, we see God's sovereign guidance in the apostle Paul's mission to Macedonia. When Paul had a vision of a man from Macedonia calling him to share the gospel, he immediately obeyed, demonstrating the importance of responding to God's call. The subsequent conversion of Lydia, a seller of purple, illustrates how God opens hearts to receive the message of salvation. This assurance of God’s call and the blessings that come from obedience are foundational for believers as they seek to fulfill the Great Commission.