Acts 16:30 - Ellicott's Commentary On The Whole Bible

Sirs, what must I do to be saved? — The use of “Sirs” differs from that of Acts 7:26 in having a Greek word, expressive of respect (that used in John 20:15), corresponding to it. We ask what the gaoler meant by the question. Was he thinking of temporal safety from the earthquake, or from punishment; or had there come upon him, in that suicidal agony, the sense of an inward misery and shame, a “horror of great darkness” from which he sought deliverance? The latter seems every way most probable. It must be remembered that the very circumstances which had brought St. Paul to the prison had pointed him out as “proclaiming the way of salvation” (Acts 16:17). The witness of the demoniac girl was thus not altogether fruitless.