31 I pass by the work wrought at Troas on Eutychus, who being borne down by his sleep fell down from the third loft, and was taken up dead; yet was saved alive by Paul. I also pass by the prophecies addressed to the Elders of Ephesus whom he called to him in Miletus, to whom he openly said, That the Holy Ghost witnesses in every city, saying — and the rest; for by saying, in every city, Paul made manifest that the marvellous works done by him in each city, were from the operative power of the Holy Ghost, by the will of God, and in the Name of Christ who spoke in him.
By the power of this Holy Ghost, the same Paul was hastening to this holy city Jerusalem, and this, though Agabus by the Spirit foretold what should befall him; and yet he spoke to the people with confidence, declaring the things concerning Christ. And when brought to Cesarea, and set amid tribunals of justice, at one time before Felix, and at another before Festus the governor and King Agrippa, Paul obtained of the Holy Ghost grace so great, and triumphant in wisdom, that at last Agrippa himself the king of the Jews said, Almost you persuade me to be a Christian. This Holy Spirit granted to Paul, when he was in the island of Melita also, to receive no harm when bitten by the viper, and to effect various cures on the diseased.
This Holy Spirit guided him, the persecutor of old, as a herald of Christ, even as far as imperial Rome, and there he persuaded many of the Jews to believe in Christ, and to them who gainsaid he said plainly, Well spoke the Holy Ghost by Esaias the Prophet, saying unto your fathers, and the rest.
Source: Catechetical Lectures (New Advent)