The apostle Paul visits the city of Athens, which was was the central focal point of Greek culture. Even though now politically weak, and under Roman sovereignty, it was the intellectual home of the empire and of the Gentile world generally. As Paul looks around Athens, he is deeply agitated by the abounding influence of false religion in the city. Temples and idols were everywhere.
We are then told in Acts 17:17, “Therefore disputed he ... in the market daily with them that met with him”. So in the places of public gathering he disputes and reasons with those who adhered to Greek religion and to the different schools of philosophy, including the Epicureans and the Stoics.
We learn from how Paul conducted himself in how the Gospel should be preached today. The following points are important :
1) Paul preached on Christ - His death and resurrection;
2)Paul preached on God as the Creator and Sustainer of all life;
3)Paul denounced religious error (this in no way implies hostility or discourtesy);
4)Paul commanded his hearers to repent, because the Day of Judgement is coming, and it is the risen Christ who is the Judge of all men.