Acts 18:7

he departed thence, and entered into a certain man's house, named Justus--not changing his lodging, as if Aquila and Priscilla up to this time were with the opponents of the apostle [ALFORD], but merely ceasing any more to testify in the synagogue, and henceforth carrying on his labors in this house of Justus, which "joining hard to the synagogue," would be easily accessible to such of its worshippers as were still open to light. Justus, too, being probably a proselyte, would more easily draw a mixed audience than the synagogue. From this time forth conversions rapidly increased.

Here we are told, I. That Paul changed his quarters. Christ directed his disciples, when he sent them forth, not to go from house to house (Luk 10:7), but there might be occasion to do it, as Paul did here. He departed out of the synagogue, being driven out by the perverseness of the unbelieving Jews, and he entered into a certain man's house, named Justus, Act 18:7. It should seem, he went to this man's house, not to lodge, for he continued with Aquila and Priscilla, but to preach. When the Jews would not let him go on peaceably with his work in their meeting, this honest man opened his doors to him, and told him he should be welcome to preach there; and Paul accepted the proposal. It was not the first time that God's ark had taken up its lodging in a private house. When Paul could not have liberty to preach in the synagogue, he preached in a house, without any disparagement to his doctrine. But observe the account of this man and his house. 1. The man was next door to a Jew; he was one that worshipped God; he was not an idolater, though he was a Gentile, but was a worshipper of the God of Israel, and him only, as Cornelius. That Paul might give the less offence to the Jews, though he had abandoned them, he set up his meeting in this man's house. Even when he was under a necessity of breaking off from them to turn to the Gentiles, yet he would study to oblige them. 2. The house was next door to the synagogue, it joined close to it, which some perhaps might interpret as done with design to draw people from the synagogue to the meeting; but I rather think it was done in charity, to show that he would come as near to them as he could, and was ready to return to them if they were but willing to receive his message, and would not contradict and blaspheme as they had done. I…

18:7 Titius Justus (“Titus the Just”) was a Gentile who worshiped God (a “God-fearer”; see study note on 10:2). Because Titus was a common Roman name, Justus differentiates him from the better-known Titus, Paul’s co-worker (2 Cor 2:13; 7:6, 13; 8:6, 16, 23; Titus).