Acts 16:28 - Ellicott's Commentary On The Whole Bible

Do thyself no harm. — Few and simple as the words are, they are eminently characteristic of the love and sympathy which burnt in St. Paul’s heart. For him the suicide which others would have admired, or, at least, have thought of without horror, would have been the most terrible of all forms of death. He could not bear the thought that even the gaoler who had thrust him into the dungeon, should so perish in his despair.