When you see a "finish line" you think that once you pass it you're done, but you aren't.
There's always something more. There's always another road to take. Another mountain to climb. Another sea to swim. There's always another "finish line." Another goal to reach. Another record to set or break. Another chapter to your book of life.
Seems like it goes on forever. A harder journey than the last one. You strive and fall. Break and heal. You keep going and give up. Though win or lose you'll learn, sometimes painful, lessons. All until you pass the "finish line" and then it begins all over again.
There's no end until the day you've lived your life until the end. So take one step at a time or one giant leap of faith. Go for all the "finish lines" and go run your life until you've reached your "finish line."