Interestingly Paul takes them back to creation and judgement by this resurrected Judge which is right out of
Rom1 - creation and judgment - which
Rom1 instructs all people inherently know and accept or reject.
Thus, it's interesting that teachings like this show us the approach to the Greeks was really about creation and the knowledge God has made inherent in mankind re: His existence, divinity and power.
None of this was or is difficult to understand. It's simply choosing to believe in reality/Truth vs. alternate manufactured realities.