17:22-31 Here we have a sermon to heathens, who worshipped false gods, and were without the true God in the world; and to them the scope of the discourse was different from what the apostle preached to the Jews. In the latter case, his business was to lead his hearers by prophecies and miracles to the knowledge of the Redeemer, and faith in him; in the former, it was to lead them, by the common works of providence, to know the Creator, and worship Him. The apostle spoke of an altar he had seen, with the inscription, TO THE UNKNOWN GOD. This fact is stated by many writers. After multiplying their idols to the utmost, some at Athens thought there was another god of whom they had no knowledge. And are there not many now called Christians, who are zealous in their devotions, yet the great object of their worship is to them an unknown God? Observe what glorious things Paul here says of that God whom he served, and would have them to serve. The Lord had long borne with idolatry, but the times of this ignorance were now ending, and by his servants he now commanded all men every where to repent of their idolatry. Each sect of the learned men would feel themselves powerfully affected by the apostle's discourse, which tended to show the emptiness or falsity of their doctrines.

23. as I passed by and beheld your devotions—rather, "the objects of your devotion," referring, as is plain from the next words, to their works of art consecrated to religion.

I found an altar … To the—or, "an"

unknown god—erected, probably, to commemorate some divine interposition, which they were unable to ascribe to any known deity. That there were such altars, Greek writers attest; and on this the apostle skilfully fastens at the outset, as the text of his discourse, taking it as evidence of that dimness of religious conception which, in virtue of his better light, he was prepared to dissipate.

Whom therefore ye ignorantly worship—rather, "Whom, therefore, knowing Him not, ye worship," alluding to "The Unknown God."

him declare—announce.

I unto you—This is like none of his previous discourses, save that to the idolaters of Lycaonia (Ac 14:15-17). His subject is not, as in the synagogues, the Messiahship of Jesus, but THE Living God, in opposition to the materialistic and pantheistic polytheism of Greece, which subverted all true religion. Nor does he come with speculation on this profound subject—of which they had had enough from others—but an authoritative "announcement" of Him after whom they were groping not giving Him any name, however, nor even naming the Saviour Himself but unfolding the true character of both as they were able to receive it.