1 Kings 18:39 - Joseph Benson’s Commentary on the Old and New Testaments

When all the people saw it, they fell on their faces In acknowledgment and adoration of the true God; and all, as one man, cried out, Jehovah, he is the God He alone; and Baal is a senseless idol. And they repeated the words to signify their abundant satisfaction, and assurance of the truth of their assertion. And some, we may hope, had their hearts so turned back as to be determined that he should be their God, and that they would serve him only, Joshua 24:24. But it is certain the generality of them were convinced only, not converted; they yielded to the truth of God, that he is the God, but consented not to his covenant that he should be their God. Blessed are they, who have not seen what they saw, and yet have believed, and been influenced more than they that saw it.