John Calvin on Acts 13:7

7. And whereas Sergius Paulus, desiring some better thing than that which he had learned from his childhood, was unaptly drawn aside unto diverse superstitions, I gather hereby that he sendeth for Paul and Barnabas of his own accord, to teach him. Therefore, he had conceived a certain reverence and fear of God, though he knew him not as yet; and forasmuch as he was persuaded that that was the true God which was worshipped in Judea, he desired to know out of his word a pure and certain rule of godliness. So soon as he hath tasted of the dotings of the false prophet he standeth in doubt. And it is not to be doubted, but that God doth solicit his mind, that he may not be altogether stayed in vanity, though he suffered himself to be deceived for a time by a wicked man.