The greatest objection which these men had against the gospel was, that it was strange and new. That it is not new was apparent, it having been in the Old Testament (as the ripe fruit is in the blossom) so long ago; and their own superstitions were but so many apish imitations of God's worship. And if these things were strange unto them, they might thank themselves, who had not made due inquiring after them; and had, by their not improving the light of nature, provoked God to withhold further manifestations unto them, Romans 1:24,28.
Related Commentaries of Acts 17:20
Acts 17:20
20 For thou bringest certain strange things to our ears: we would know therefore what these things mean.