Charles Ellicott Commentary Acts 18:2

"And he found a certain Jew named Aquila, a man of Pontus by race, lately come from Italy, with his wife Priscilla, because Claudius had commanded all the Jews to depart from Rome: and he came unto them;" — Acts 18:2 (ASV)

We cannot exclude from the probable motives the strong feeling of thankfulness for deliverance from danger, following fear, which, as in nearly all phases of the religious life, has been the chief impulse from which vows have grown. We have seen the fear, and the promise, and the deliverance, in the record of St. Paul’s work at Corinth, and the vow of self-consecration, for a season, to a life of special devotion was the natural result. St. Paul had not learned to despise or condemn such expressions of devout feeling.