The jailer said, "What must I do to be saved?"
FK, what verse tells us the answer did Paul give to that Jailer? What does that verse say?
It is here:
Acts 16:31-34 : 31 They replied, "Believe in the Lord Jesus, and you will be saved—you and your household." 32 Then they spoke the word of the Lord to him and to all the others in his house. 33 At that hour of the night the jailer took them and washed their wounds; then immediately he and all his family were baptized. 34 The jailer brought them into his house and set a meal before them; he was filled with joy because he had come to believe in God—he and his whole family.
This says to me that Paul told a seeker what must happen for him to enter Heaven. He was correct. In the context of the jailer it is certainly true that he must at some point become a true believer if he is to go to Heaven. It is also true that God uses us Christians in the furtherance of that happening to the elect (in one sense, those already saved). God used Paul, and taught us how we will similarly be used, to bring a seeker toward the, in this case inevitable, goal of acceptance.
Now, God did not need Paul, and does not need us, but He has chosen to use us anyway as witnesses to His sole work. I see that it was actually a blessing TO Paul, and likewise us, to involve him (and us) in the transformation process. We get to watch, and what a wonderful blessing it is.