In Acts 17:16-34, Paul is passing through Athens. He can’t help himself but engage spiritually with the people around him. He was ‘greatly distressed’ that the city was full of idols (verse 16). This leads to him reasoning with the Athenians about God.
Read Acts 17:22-31.
Paul shows genuine concern for the spiritual state of people around him, and he isn’t shy to bring up spiritual things. He talks directly about God, repentance, the judgment to come, and Jesus rising from the dead.
It can be a daunting thought to bring up these topics with people. Sometimes a good first step is to engage people about the deeper issues of life before we go there. Asking good questions about what’s going on for them personally, or asking their thoughts on the current social issues in our world, can provide excellent bridges to the more obvious “spiritual” topics.