Charles Ellicott Commentary 1 Kings 17:24

"And the woman said to Elijah, Now I know that thou art a man of God, and that the word of Jehovah in thy mouth is truth." — 1 Kings 17:24 (ASV)

Now by this I know ... —In these words we trace the final victory of faith, brought out by the crowning mercy of the restoration of her son. First, the widow had spoken of Jehovah from without, as the Lord thy God (1 Kings 17:14); next, had come to recognise Him as God (1 Kings 17:18); now she not only believes, as she had never believed before, that His servant is a man of God; but, in accepting the word of Jehovah in his mouth as the truth, seems undoubtedly to express conversion to Him. (Compare the stages of faith in the nobleman at Capernaum, John 4:47, 50, 53.)