When I was a child, I was told the story about a rabbit and a turtle running a race. Despite the fact that rabbit was faster than turtle, but the turtle still kept walking step by step by step all this time. He never quit no matter how hot or tired he got. He just kept going. At the end, surprisingly, the turtle won that race.
From a psychological perspective, in this case, this turtle from the old folk tale was gritier than the rabbit. This race required a lot of stamnia to win. As you can see, the turtle, for sure, has passion and perseverance for that long-time goal. Compared to the rabit, while he obviously has ability to run faster than the turtle, he did not succeed eventually. The ending of the moral story is now explained from the science view.