Part of the story was that the younger brother was stronger because of a genetic advantage that he had. The older brother had asthma and several other things that held him back so he always lost when they raced.
Looking back on his experience the older brother explained that the crux of the game was saving enough energy to be able to make the swim back to shore, only going as far as you knew you could swim back.
Finally, there was one instance when the older brother won. Years later the younger brother asked the older brother how he was able to win in spite of all his challenges. In answer to his question the younger brother responded that he didn't save any energy for the swim back. He was so focused on his goal that he used all of his energy to achieve it.
I saw this movie several years ago and I've often pondered the wisdom of his decision. After all, it is kind of dangerous to use up all of your energy to swim to the middle of a lake with no way of getting back other than using your own -now depleted-energy. When he decided to not hold anything back he had enough trust that everything would work out to outweigh the risk of drowning in the lake.
The movie doesn't really specify what he was putting his trust in, but when I apply the story to myself I put my trust in the Lord. There are some things that the Lord asks me to do that seem too hard for me because of my weaknesses. I am often afraid to use up all of my energy in attempting to do the Lord's will for fear of "drowning" (failing). BUT, deep down I know that I won't ever really fail if I put my trust in the Lord.
There are some great scriptures that help me to remember that having trust in the Lord always works out.
"I can do all things through Christ which strengtheneth me." Philippians 4:13
"I will go and do the things which the Lord hath commanded, for I know that the Lord giveth no commandments unto the children of men, save he shall prepare a way for them that they may accomplish the thing which he commandeth them." 1 Nephi 3:7
I know that the above is true. We can do anything the Lord expects of us if we just put our trust in Him and exert all of our energy in accomplishing it. I invite all of you to test the Lord, put your trust in Him and see if everything won't just work out for your good. I know it will.