TSK · Acts 18:8

All the men of his household, whether born in his household or bought with money from a foreigner, were circumcised with him.

If you have no desire to worship the LORD, choose today whom you will worship, whether it be the gods whom your ancestors worshiped beyond the Euphrates, or the gods of the Amorites in whose land you are living. But I and my family will worship the LORD.

Then one of the synagogue leaders, named Jairus, came up, and when he saw Jesus, he fell at his feet.

He said to them,“Go into all the world and preach the gospel to every creature.

But when they believed Philip as he was proclaiming the good news about the kingdom of God and the name of Jesus Christ, they began to be baptized, both men and women.

He was a devout, God-fearing man, as was all his household; he did many acts of charity for the people and prayed to God regularly.

After the reading from the law and the prophets, the leaders of the synagogue sent them a message, saying,“Brothers, if you have any message of exhortation for the people, speak it.”

The jailer brought them into his house and set food before them, and he rejoiced greatly that he had come to believe in God, together with his entire household.

How are they to call on one they have not believed in? And how are they to believe in one they have not heard of? And how are they to hear without someone preaching to them?