Jesus encouraged Paul in Corinth, “Do not be afraid, but go on speaking and do not be silent, for I am with you, and no one will attack you to harm you, for I have many in this city who are my people” (Acts 18:9–10). These words are encouraging to us today as well, giving us multiple motivations to give the gospel to the lost.
We are motivated to make disciples by the presence of the Lord.
Paul could be fearless and vocal for the gospel because Jesus promised him, “I am with you.” As seen in the Great Commission (Matt 28:18), this promise is to us today and for exactly the same reason—making disciples. The presence of the Lord is that of the Lord Jesus who possesses universal authority and accompanies us until He comes again (Matt 28:18, 20). With His help, who can be against us to thwart His purposes?
We are motivated to make disciples by the protection of the Lord.
Paul was uniquely promised, “no one will attack you to harm you,” and Paul therefore suffered no injury in Corinth (cf. Acts 18:11–17). Already in the book of Acts, however, the apostles had been arrested and beaten, Stephen and James had been martyred, and the church experienced other persecutions as well. While we wish we could claim physical protection at all times when we go out for the sake of the gospel, sometimes God allows His servants to fall to an unholy sword. Even then, however, our soul is eternally safe. We should therefore “not fear those who kill body but cannot kill the soul. Rather fear him who can destroy both soul and body in hell” (Matthew 10:28), even if it means suffering physical death. Being willing to uphold the name of Christ shows one’s faith to the end, and Christ Himself will acknowledge such a one before His Father who is in heaven (Matthew 10:32).
We are motivated to make disciples by the people of the Lord.
Paul was told in advance that some of the Corinthians yet to be evangelized were part of the “many” that were “my people,” that is, people who belonged to God (Acts 18:10). God knows the beginning from the end and who would respond to the gospel in faith. Their faith was patently certain and could be promised as such to Paul. Paul simply needed to give the gospel in order for them to believe. While we may wish that Christ would identify the cities where disciples will be made, we already have His promise to go to the nations of the world wherein He will build His church (Matt 16:18; 28:19). We simply need to give the gospel and make disciples of those who believe.