Acts 27:31 - Ellicott's Commentary On The Whole Bible

Except these abide in the ship... — We need hardly embarrass ourselves with the question how far the divine promise was dependent on the contingency thus specified. Prompt vigour, and clear discernment of what was needed on the instant, spoke out in the Apostle’s words. The assurance that had been graciously given was to be realised, not by the apathy of a blind fatalism, but by man’s co-operation. It was obvious that landsmen like the soldiers and the prisoners would be quite unequal to the task of handling a large ship under such critical conditions, and the presence of the sailors was therefore, from a human point of view, essential to the safety of the others. The thoughtful vigilance of St. Paul, even in those hours of darkness, was eminently characteristic.