Acts 27:31

Paul said to the centurion and to the soldiers, "Except these abide in the ship, ye cannot be saved": so saying, not on this account, but that he might restrain them, and the prophecy might not fall to the ground. Accordingly observe how the centurion does as he bids him, insomuch that he even let the boat go, and destroyed it. And if the sailors did not as yet comply with his bidding, yet afterwards they do so: for in fact this is a reckless sort of people.

The sailors however, were about to escape, having no faith in what was said: but the centurion does believe Paul. For he says, If these flee, "ye cannot be saved": so saying, not on this account, but that he might restrain them, and the prophecy might not fall to the ground. See how as in a church they are instructed by the calmness of Paul's behavior, how he saved them out of the very midst of the dangers. And it is of providential ordering that Paul is disbelieved, that after proof of the facts, he might be believed: which accordingly was the case.

But when he said, "Unless these stay in the ship, you cannot be saved," Paul spoke wisely, so as to hold them and not let the prophecy fail. Therefore when they saw that their lack of resolve had put them in danger, then they began …

That they would not have regarded. The soldiers were not careful for the lives of the prisoners: nor was Paul careful for his own. We may learn hence, to use the most proper means for security and success, even while we depend on Divine Providence, and wait for the accomplishment of God's own promise.

Paul speaks as a prudent man, not as a prophet, when he says, These are necessary to your preservation. Duty is ours, events are God's; and we do not trust God, but tempt him, when we say, "We put ourselves under his protection," and do not use proper means, such as are within our power, for our own preservation.