14:15 living God. When Paul and Barnabas preached in the synagogues, they could begin on the premise that their hearers already believed in God, in creation of all things by God, and in the authority of the Scriptures. On this foundation, they could then preach Christ and the resurrection. When they preached to a completely pagan crowd, however, as here at Lystra and later at Athens (Acts 17:15-34), they had to begin with the evidence for one Creator God, as opposed to the popular religions which were centered either on atheism or pantheism and manifested popularly as polytheism. All of these believed in the eternity of the universe and in some form of universal evolutionism, just as most unbelievers do today.