What did Paul preach to the Athenians about God?
Paul preached that the Unknown God he was revealing is the Lord of heaven and earth, the Creator of everything. He told the people to seek the Lord, feeling after Him and finding Him, because He is not far from every one of us.
Les explains that they had an inkling that there was somebody out there they did not know about, so they left a blank space for that Unknown God. Paul told them this was the one he was bringing them to and revealing. Paul preached his Gospel, declaring that God is the Lord of heaven and earth and the one who created everything. In verse 27, Paul said they should seek the Lord, if haply they might feel after him and find him, because he is not far from every one of us.
God that made the world and all things therein, seeing that he is Lord of heaven and earth, dwelleth not in temples made with hands;