5:18 Put them in the common prison. In the city jail, among malefactors. Van Lenneps says:
The common prison, corresponding to our jail, consists of a single room in the governor's cellar, with a floor of earth, and one small window, where all manner of people, from the murderer to the insolent debtor, are promiscuously crowded together. The only furniture consists of a bench, always occupied by the strongest; the rest lie on the floor, or stand. We have visited prisons of this kind where we could only stand a few moments upon the threshold on account of the foul air. The keepers remain outside of the door (Ac 5:23), but the prisoners are not bound.''
5:17-25 There is no prison so dark, so strong, but God can visit his people in it, and, if he pleases, fetch them out. Recoveries from sickness, releases out of trouble, are granted, not that we may enjoy the comforts of life, but that God may be honoured with the services of our life. It is not for the preachers of Christ's gospel to retire into corners, as long as they can have any opportunity of preaching in the great congregation. They must preach to the lowest, whose souls are as precious to Christ as the souls of the greatest. Speak to all, for all are concerned. Speak as those who resolve to stand to it, to live and die by it. Speak all the words of this heavenly, divine life, in comparison with which the present earthly life does not deserve the name. These words of life, which the Holy Ghost puts into your mouth. The words of the gospel are the words of life; words whereby we may be saved. How wretched are those who are vexed at the success of the gospel! They cannot but see that the word and power of the Lord are against them; and they tremble for the consequences, yet they will go on.