One thing that can be learned is patience. Fishing often requires waiting for a long time for the fish to bite, just like in life we need to be patient for good things to come. For example, the boy in the story had to sit still for hours.
We can learn about the importance of perseverance. In a boys fishing story, the boy may face difficulties like not catching any fish at first or having his line break. But if he keeps trying, like re - baiting or finding a new spot, he can succeed. It's like when we face challenges in our goals, we should not give up easily.