He has given assurance of this to all by raising Him from the dead

When Paul arrived at Thessalonica, he did the usual preaching by going to the synagogue first. It describes here that Paul "reasoned" with them to show that Yeshua is the Messiah. In other words, Paul must have used logical and Scriptural based arguments to prove that Jesus is the Christ. Also the devout Greeks, most probably converted to Judaism, now believed Paul. The others who did not believed caused trouble for Paul and accused him of being against Caesar. When they could not find Paul, they arrested Jason who probably hosted Paul in his home. Eventually the authorities released Jason and the rest after taking money from them.

Paul and Silas were sent to Berea and they again preached first in the Synagogue. The people at Berea were described as being more fair-minded that those at Thessalonica and the searched the Scriptures daily. This probably meant that the Bereans were less emotional than the Thessalonicans, and they were also very diligent in trying to search the Scriptures to confirm Paul's teachings. When the Thessalonians arrived at Berea, Paul was again forced to move but Silas and Timothy stayed in Berea.

In Athens, Paul say many idols / Greek gods being worshipped by people. It is described that Paul's spirit was provoked by this, probably  meaning that Paul could not stand such blatant idolatry from a supposedly civilised culture. So he went to the common place of the philosophers and started speaking with logic and reason about Jesus being the Christ. The Athenians were curious and valued intellect highly. They invited Paul to speak more about his doctrine out of curiosity. Seeing a statue labeled as to an "Unknown God", Paul took the opportunity to explain Jesus.

Paul described that his God is the creator of all things, including giving life. He describes the magnificence of God and that He cannot be held in a temple or represented by an idol. He described that God does not depend on us for anything. Then Paul calls for everyone to repent towards God and warns of future judgment. Paul describes the resurrection as proof of God's power and trustworthiness. The idea of resurrection stumbled some of the Greeks, however there was a group who understood and believed, including Dionysius and Damaris.

Journey:
Amphipolis - Apollonia - Thessalonica - Berea - Athens


Acts 17
Preaching Christ at Thessalonica

1 Now when they had passed through Amphipolis and Apollonia, they came to Thessalonica, where there was a synagogue of the Jews. 2 Then Paul, as his custom was, went in to them, and for three Sabbaths reasoned with them from the Scriptures, 3 explaining and demonstrating that the Christ had to suffer and rise again from the dead, and saying, “This Jesus whom I preach to you is the Christ.” 4 And some of them were persuaded; and a great multitude of the devout Greeks, and not a few of the leading women, joined Paul and Silas.

Assault on Jason’s House

5 But the Jews who were not persuaded, becoming envious,[a] took some of the evil men from the marketplace, and gathering a mob, set all the city in an uproar and attacked the house of Jason, and sought to bring them out to the people. 6 But when they did not find them, they dragged Jason and some brethren to the rulers of the city, crying out, “These who have turned the world upside down have come here too. 7 Jason has harbored them, and these are all acting contrary to the decrees of Caesar, saying there is another king—Jesus.” 8 And they troubled the crowd and the rulers of the city when they heard these things. 9 So when they had taken security from Jason and the rest, they let them go.

Ministering at Berea

10 Then the brethren immediately sent Paul and Silas away by night to Berea. When they arrived, they went into the synagogue of the Jews. 11 These were more fair-minded than those in Thessalonica, in that they received the word with all readiness, and searched the Scriptures daily to find out whether these things were so. 12 Therefore many of them believed, and also not a few of the Greeks, prominent women as well as men. 13 But when the Jews from Thessalonica learned that the word of God was preached by Paul at Berea, they came there also and stirred up the crowds. 14 Then immediately the brethren sent Paul away, to go to the sea; but both Silas and Timothy remained there. 15 So those who conducted Paul brought him to Athens; and receiving a command for Silas and Timothy to come to him with all speed, they departed.

The Philosophers at Athens

16 Now while Paul waited for them at Athens, his spirit was provoked within him when he saw that the city was given over to idols. 17 Therefore he reasoned in the synagogue with the Jews and with the Gentile worshipers, and in the marketplace daily with those who happened to be there. 18 Then[b] certain Epicurean and Stoic philosophers encountered him. And some said, “What does this babbler want to say?”

Others said, “He seems to be a proclaimer of foreign gods,” because he preached to them Jesus and the resurrection.

19 And they took him and brought him to the Areopagus, saying, “May we know what this new doctrine is of which you speak? 20 For you are bringing some strange things to our ears. Therefore we want to know what these things mean.” 21 For all the Athenians and the foreigners who were there spent their time in nothing else but either to tell or to hear some new thing.

Addressing the Areopagus

22 Then Paul stood in the midst of the Areopagus and said, “Men of Athens, I perceive that in all things you are very religious; 23 for as I was passing through and considering the objects of your worship, I even found an altar with this inscription:

TO THE UNKNOWN GOD.

Therefore, the One whom you worship without knowing, Him I proclaim to you: 24 “God, who made the world and everything in it, since He is Lord of heaven and earth, does not dwell in temples made with hands. 25 Nor is He worshiped with men’s hands, as though He needed anything, since He gives to all life, breath, and all things. 26 And He has made from one blood[c] every nation of men to dwell on all the face of the earth, and has determined their preappointed times and the boundaries of their dwellings, 27 so that they should seek the Lord, in the hope that they might grope for Him and find Him, though He is not far from each one of us; 28 for in Him we live and move and have our being, as also some of your own poets have said, ‘For we are also His offspring.’ 29 Therefore, since we are the offspring of God, we ought not to think that the Divine Nature is like gold or silver or stone, something shaped by art and man’s devising. 30 Truly, these times of ignorance God overlooked, but now commands all men everywhere to repent, 31 because He has appointed a day on which He will judge the world in righteousness by the Man whom He has ordained. He has given assurance of this to all by raising Him from the dead.”

32 And when they heard of the resurrection of the dead, some mocked, while others said, “We will hear you again on this matter.” 33 So Paul departed from among them. 34 However, some men joined him and believed, among them Dionysius the Areopagite, a woman named Damaris, and others with them.