The Gospel Changes - Acts 17

In my study through the Gospels and Acts looking to better understand what the Gospel is, we come to a profound moment in Acts 17. Paul is preaching the Gospel to the Greeks in Athens. Much of the message is the same. He is preaching about the same God, appealing to faith, calling people to turn to God, but everything else about his message is different. He isn't appealing to scripture, he is appealing to their poets (vs. 28). Even though they have many gods, he also commends their spiritual quests, and uses them (the altar to the unknown god) to have an avenue to start talking about God. Here are a few conclusions of mine from this passage.

1) God is already working in the "unsaved" world. In the make up of the culture God is bringing good, and trying to draw them to Himself.
2) As stewards of the Gospel, we need to find what God is doing in others, and explain it to them using their language. If they don't hold scripture in high regard, maybe we ought not appeal to it. Find who their authorities are (like musicians, actors, etc), and appeal to them. Still telling the message of scripture but in their language rather than ours.
3) Don't come in condemning, but affirming, as Paul does here.
4) We must lay to rest our training of presenting the Gospel in one way (four spiritual laws, or Romans road, or the salvation prayer, etc) and be retrained to understand the gospel more deeply so that we can present it in thousands of creative ways that resonate with the culture we are talking to.
5) Finally leave the results to God. Some believed Paul, others didn't.