If you want to touch the other shore badly enough, barring an impossible situation, you will. If your desire is diluted for any reason, you'll never make it.
Diana NyadSwimming is probably the ultimate of burnout sports. It's ironic because millions of people who swim as their regular exercise love the meditation aspect of it; you don't wind up with any orthopedic injuries. But when you swim at a world class level for hours and hours - the loneness of the long distance runner.
Diana NyadFrom age eleven to age sixteen I lived a spartan life without the usual adolescent uncertainty. I wanted to be the best swimmer in the world, and there was nothing else.
Diana Nyad