John Calvin on Acts 16:33

33. He was baptized, and all his household. Luke doth again commend the godly zeal of the keeper, that he did consecrate all his whole house to the Lord; wherein doth also appear the grace of God, in that he brought all his whole family unto a godly consent. And we must also note the notable exchange: he was of late about to murder himself, because he thought that Paul and the rest were escaped; but now laying aside all fear, he bringeth them home. “Sponte,” of his own accord. So that we see how faith doth animate and encourage those to behave themselves stoutly who before had no heart. And surely, when we droop “Torpeamus,” become torpid. through fear and doubtfulness, there is no better matter of boldness than to be able to cast all our cares into God’s bosom; that no danger may terrify us from doing our duty, whilst that we look for an end at God’s hand, such as he shall see to be most profitable.