Though perhaps with reasonable excuse, as Nathan graciously said, I didn't exegete the things about God's imminence in Acts 17 sufficiently. There is so much in there about both being created for God and His desire to be known by us. Coupled to this Paul's appeal to repent of ignorance and come to know God truly, there's great beauty in the grace of God as expressed here.
Who cares? Well, I think the problem is that my talk's appeal for response was primarily based on not being found to be opposing God. Now this is a good motivation, but would have been far stronger when coupled with the appeal of the God who created me to know him and wants all people everywhere to know him.
Hmm... I'd have to do some more thinking if I was going to really develop this one properly. Ideally, I'd have preached the passage in 2 or 3 talks. We do what we can.