Katsuya Nomura is one of the most famous baseball players in Japan.
He was a catcher.
Thought a catcher must have a strong arm, he did not have it.
He began a practice of long distant throwing.
After 1 month or 2 months, he couldn’t get any results.
With 3 months practice, he wondered if he should have continued.
But he continued.
He finally got a sign of a strong arm.
If he had stopped by 4th month, he could not to have been a great baseball player.