What is the meaning of Acts 27:12-19?

12 And because the haven was not commodious to winter in, the more part advised to depart thence also, if by any means they might attain to Phenice, and there to winter; which is an haven of Crete, and lieth toward the south west and north west. 13 And when the south wind blew softly, supposing that they had obtained their purpose, loosing thence, they sailed close by Crete. 14 But not long after there arose against it a tempestuous wind, called Euroclydon. 15 And when the ship was caught, and could not bear up into the wind, we let her drive. 16 And running under a certain island which is called Clauda, we had much work to come by the boat: 17 Which when they had taken up, they used helps, undergirding the ship; and, fearing lest they should fall into the quicksands, strake sail, and so were driven. 18 And we being exceedingly tossed with a tempest, the next day they lightened the ship; 19 And the third day we cast out with our own hands the tackling of the ship. (Acts 27:12-19 KJV)

William Burkitt’s Commentary

The further difficulties and dangers which the apostle met with in this winter voyage are here described and declared, and the properest lessons of instruction which can, I think, be gathered from them, will be by way of allusion.
Thus, 1. The ship in which he sailed is an emblem of the church, in her militant state here on earth; she is afflicted, tossed with tempests, and in danger of being shipwrecked every moment; many tempestuous Euroclydons arise suddenly and threaten her fatally; but her wise pilot sits at the helm and steers her with a fixed eye and steady hand between rocks and shelves, undergirding her by his everlasting arms of power and love which are underneath her; and when in our apprehensions she is brought to a hopeless and helpless state, without the light of sun or stars to comfort her; then does the Lord enlighten our darkness, and at midnight there shall be light.
Again, 2. This voyage, neglected in the summer, and undertaken in the winter season to the peril of the passengers and the loss of the ship, lively represents to us both the folly and danger of persons who allow the spring of youth and the summer of ripe age to slide and slip away from them; and when the winter of old age comes upon them, then they think of launching forth towards the fair haven of eternal happiness, and not before.
Set we forth never so soon, the winds will be contrary, the weather tempestuous, the rocks many, the difficulties great. And yet, Lord! How is our precious time spent and spilt! When age comes upon us, we complain we want time, whereas we foolishly waste it; how are miserable souls that set out late for heaven, (when we can serve sin no longer,) benighted, bewildered, shipwrecked, eternally and irrecoverably lost!–Behold, now only is the accepted time now is the day of salvation.