John Calvin on Acts 16:10

10. Being fully persuaded. Hence we gather, that is was not bare vision, but that it was also confirmed by the testimony of the Spirit. For Satan doth oftentimes abuse ghosts and visures [masks] to deceive withal, that he may mock and cozen the unbelievers. Whereby it cometh to pass, that the bare vision leaveth man’s mind in doubt; but such as are divine indeed, those doth the Spirit seal by a certain mark, that those may not doubt nor waver whom the Lord will have certainly addicted to himself. A wicked spirit appeared to Brutus, inviting him to enter that unhappy combat and battle which he had at Philippi, even in the very same place whereunto Paul was afterwards called. But as the cause was far unlike, so the Lord dealt far otherwise with his servant, so that he put him out of doubt, and left him not astonished with fear. Now, in Paul and his companions the desire to obey ensued immediately upon the certainty; for, so soon as they understand that the Lord called them, they address themselves to their journey. The termination of the participle which is here used is active; and though it have divers significations, I do not doubt but that Luke’s meaning is, that Paul and the rest, after that they had conferred [compared] this vision with the former oracles, were fully persuaded that the Lord had called them into Macedonia.

Acts 16:11-15

11. Therefore, when we had loosed from Troas, we came with a straight course in Samothracia, and the day following to Neapolis; 12. And from thence to Philippi, which is the chief city of the parts of Macedonia, being a free city; and we stayed in the same city certain days. 13. And on the day of the Sabbaths we went out of the city beside a river, where was wont to be prayer; and sitting, we spake to the women which came together. 14. And a certain woman named Lydia, a seller of purples, of the city of the Thyatirans, which worshipped God, heard; whose heart the Lord opened, that she might take heed to those things which were spoken of Paul. 15. And when she was baptized, and her house, she besought us, saying, If ye judge me faithful to the Lord, enter into my house and tarry. And she enforced us.