I learned that James Garfield, who would go on to become the 20th president of the USA, nearly died as teenager, but was saved by what could be called a miracle.
Excerpt from Candice Millard’s Destiny of the Republic:
As he stood alone at the bow one night, struggling with a coiled rope, he lost his balance and, before he could right himself, fell into the canal. He had fallen in before, more than a dozen times, but each time it had been daylight, and there had been men on deck to pull him out.
Now it was midnight, and Garfield was certain that he would drown. He cried out for help although he knew it was useless. Everyone on the boat was fast asleep. As he searched frantically and blindly for something to save his life, his hands suddenly struck the rope that had been the cause of his fall. Gripping it tightly, he found that, with a "great struggle," he could use it to slowly pull himself up until, finally, he fell heavily onto the boat.
As he sat, dripping and scared, on the deck of the canal boat, Garfield wondered why he was still alive. The rope was not secured to anything on the boat. When he had pulled on it, it should have fallen off the deck, slipping to the bottom of the canal and leaving him to drown. "Carefully examining it, I found that just where it came over the edge of the boat it had been drawn into a crack and there knotted itself," he would later write. "I sat down in the cold of the night and in my wet clothes and contemplated the matter. . . . I did it believe that God had paid any attention to me on my own account but I thought He had saved me for my mother and for something greater than canaling."